diff --git a/src/V3AstNodeExpr.h b/src/V3AstNodeExpr.h
index 85db37c01..114f2f4cd 100644
--- a/src/V3AstNodeExpr.h
+++ b/src/V3AstNodeExpr.h
@@ -972,13 +972,13 @@ public:
     class StringToParse {};  // for creator type-overload selection
     AstConst(FileLine* fl, StringToParse, const char* sourcep)
         : ASTGEN_SUPER_Const(fl)
-        , m_num{this, sourcep} {
+        , m_num{this, V3Number::VerilogNumberLiteral{}, sourcep} {
         initWithNumber();
     }
     class VerilogStringLiteral {};  // for creator type-overload selection
     AstConst(FileLine* fl, VerilogStringLiteral, const string& str)
         : ASTGEN_SUPER_Const(fl)
-        , m_num{V3Number::VerilogStringLiteral{}, this, str} {
+        , m_num{this, V3Number::VerilogStringLiteral{}, str} {
         initWithNumber();
     }
     AstConst(FileLine* fl, uint32_t num)
@@ -1024,7 +1024,7 @@ public:
     class String {};  // for creator type-overload selection
     AstConst(FileLine* fl, String, const string& num)
         : ASTGEN_SUPER_Const(fl)
-        , m_num{V3Number::String{}, this, num} {
+        , m_num{this, V3Number::String{}, num} {
         dtypeSetString();
     }
     class BitFalse {};
@@ -1043,28 +1043,28 @@ public:
     class All0 {};
     AstConst(FileLine* fl, All0)
         : ASTGEN_SUPER_Const(fl)
-        , m_num(this, "'0") {  // Need () constructor
+        , m_num{this, V3Number::VerilogNumberLiteral{}, "'0"} {
         initWithNumber();
         fl->warnOff(V3ErrorCode::NEWERSTD, true);
     }
     class All1 {};
     AstConst(FileLine* fl, All1)
         : ASTGEN_SUPER_Const(fl)
-        , m_num(this, "'1") {  // Need () constructor
+        , m_num{this, V3Number::VerilogNumberLiteral{}, "'1"} {
         initWithNumber();
         fl->warnOff(V3ErrorCode::NEWERSTD, true);
     }
     class Null {};
     AstConst(FileLine* fl, Null)
         : ASTGEN_SUPER_Const(fl)
-        , m_num{V3Number::Null{}, this} {
+        , m_num{this, V3Number::Null{}} {
         dtypeSetBit();  // Events 1 bit, objects 64 bits, so autoExtend=1 and use bit here
         initWithNumber();
     }
     class OneStep {};
     AstConst(FileLine* fl, OneStep)
         : ASTGEN_SUPER_Const(fl)
-        , m_num{V3Number::OneStep{}, this} {
+        , m_num{this, V3Number::OneStep{}} {
         dtypeSetLogicSized(64, VSigning::UNSIGNED);
         initWithNumber();
     }
diff --git a/src/V3EmitCFunc.cpp b/src/V3EmitCFunc.cpp
index bd8f053ad..726f1105f 100644
--- a/src/V3EmitCFunc.cpp
+++ b/src/V3EmitCFunc.cpp
@@ -596,6 +596,7 @@ void EmitCFunc::emitConstant(AstConst* nodep, AstVarRef* assigntop, const string
 }
 
 void EmitCFunc::emitConstantString(const AstConst* nodep) {
+    // Const might be a Verilog array-type string, but need to always output std::string
     putnbs(nodep, "std::string{");
     const string str = nodep->num().toString();
     if (!str.empty()) putsQuoted(str);
diff --git a/src/V3Number.cpp b/src/V3Number.cpp
index 02a83f925..a10d5d856 100644
--- a/src/V3Number.cpp
+++ b/src/V3Number.cpp
@@ -95,7 +95,7 @@ void V3Number::v3errorEndFatal(const std::ostringstream& str) const
 // Read class functions
 // CREATION
 
-V3Number::V3Number(VerilogStringLiteral, AstNode* nodep, const string& str) {
+V3Number::V3Number(AstNode* nodep, VerilogStringLiteral, const string& str) {
     // Create a number using a verilog string as the value, thus 8 bits per character.
     if (str.empty()) {  // IEEE 1800-2023 11.10.3 "" = "\000"
         init(nodep, 8);
diff --git a/src/V3Number.h b/src/V3Number.h
index a351991bb..a740da53d 100644
--- a/src/V3Number.h
+++ b/src/V3Number.h
@@ -488,28 +488,29 @@ public:
         opCleanThis();
     }
     // Create from a verilog 32'hxxxx number.
-    V3Number(AstNode* nodep, const char* sourcep) { create(nodep, sourcep); }
-    V3Number(FileLine* flp, const char* sourcep) { create(flp, sourcep); }
+    class VerilogNumberLiteral {};  // For creator type-overload selection
+    V3Number(AstNode* nodep, VerilogNumberLiteral, const char* sourcep) { create(nodep, sourcep); }
+    V3Number(FileLine* flp, VerilogNumberLiteral, const char* sourcep) { create(flp, sourcep); }
     class VerilogStringLiteral {};  // For creator type-overload selection
-    V3Number(VerilogStringLiteral, AstNode* nodep, const string& str);
+    V3Number(AstNode* nodep, VerilogStringLiteral, const string& str);
     class Double {};
-    V3Number(Double, AstNode* nodep, double value) {
+    V3Number(AstNode* nodep, Double, double value) {
         init(nodep, 64);
         setDouble(value);
     }
     class String {};
-    V3Number(String, AstNode* nodep, const string& value) {
+    V3Number(AstNode* nodep, String, const string& value) {
         init(nodep);
         setString(value);
         m_data.m_fromString = true;
     }
     class OneStep {};
-    V3Number(OneStep, AstNode* nodep) {
+    V3Number(AstNode* nodep, OneStep) {
         init(nodep, 64);
         m_data.m_is1Step = true;
     }
     class Null {};
-    V3Number(Null, AstNode* nodep) {
+    V3Number(AstNode* nodep, Null) {
         init(nodep);
         m_data.setLogic();
         m_data.m_isNull = true;
@@ -525,10 +526,6 @@ public:
         opCleanThis();
         m_fileline = nump->fileline();
     }
-    V3Number(AstNode* nodep, double value) {
-        init(nodep, 64);
-        setDouble(value);
-    }
     V3Number(AstNode* nodep, const AstNodeDType* nodedtypep);
 
     V3Number(const V3Number& other) = default;
diff --git a/src/V3Param.cpp b/src/V3Param.cpp
index a7318adc1..f73f6969e 100644
--- a/src/V3Param.cpp
+++ b/src/V3Param.cpp
@@ -198,7 +198,7 @@ public:
             if (pinValuep->isDouble()) {
                 var = pinValuep->num().toDouble();
             } else {  // Cast from integer to real
-                V3Number varNum{pinValuep, 0.0};
+                V3Number varNum{pinValuep, V3Number::Double{}, 0.0};
                 varNum.opIToRD(pinValuep->num());
                 var = varNum.toDouble();
             }
diff --git a/src/V3ParseImp.h b/src/V3ParseImp.h
index 15d54ec5f..d2e3aa988 100644
--- a/src/V3ParseImp.h
+++ b/src/V3ParseImp.h
@@ -245,7 +245,7 @@ public:
         return strp;
     }
     V3Number* newNumber(FileLine* flp, const char* text) {
-        V3Number* nump = new V3Number{flp, text};
+        V3Number* nump = new V3Number{flp, V3Number::VerilogNumberLiteral{}, text};
         m_numberps.push_back(nump);
         return nump;
     }
diff --git a/src/V3Unknown.cpp b/src/V3Unknown.cpp
index bca507440..bfc06199d 100644
--- a/src/V3Unknown.cpp
+++ b/src/V3Unknown.cpp
@@ -540,9 +540,9 @@ class UnknownVisitor final : public VNVisitor {
                 // TODO make a tieoff function that takes AstNode and returns typed value
                 V3Number xnum{nodep, nodep->width()};
                 if (nodeDtp->isDouble()) {
-                    xnum = V3Number{V3Number::Double{}, nodep, 0.0};
+                    xnum = V3Number{nodep, V3Number::Double{}, 0.0};
                 } else if (nodeDtp->isString()) {
-                    xnum = V3Number{V3Number::String{}, nodep, ""};
+                    xnum = V3Number{nodep, V3Number::String{}, ""};
                 } else {
                     xnum.setAllBitsX();
                 }