diff --git a/src/math/all_test.go b/src/math/all_test.go
index efbb218d5b..886267bc17 100644
--- a/src/math/all_test.go
+++ b/src/math/all_test.go
@@ -1688,8 +1688,11 @@ var vfpowSC = [][2]float64{
 	{Nextafter(-1, 2), float64(1 << 63)},
 	{Nextafter(-1, -2), float64(1 << 63)},
 
-	// Issue #57465, exponent is an even number that overflows int64
+	// Issue #57465
 	{Copysign(0, -1), 1e19},
+	{Copysign(0, -1), -1e19},
+	{Copysign(0, -1), 1<<53 - 1},
+	{Copysign(0, -1), -(1<<53 - 1)},
 }
 var powSC = []float64{
 	0,               // pow(-Inf, -Pi)
@@ -1766,8 +1769,11 @@ var powSC = []float64{
 	0,       // pow(Nextafter(-1, 2), float64(1 << 63))
 	Inf(1),  // pow(Nextafter(-1, -2), float64(1 << 63))
 
-	// Issue #57465, exponent is an even number that overflows int64
-	0,
+	// Issue #57465
+	0,               // pow(-0, 1e19)
+	Inf(1),          // pow(-0, -1e19)
+	Copysign(0, -1), // pow(-0, 1<<53 -1)
+	Inf(-1),         // pow(-0, -(1<<53 -1))
 }
 
 var vfpow10SC = []int{
diff --git a/src/math/pow.go b/src/math/pow.go
index 32ecf5870f..3f42945376 100644
--- a/src/math/pow.go
+++ b/src/math/pow.go
@@ -6,6 +6,11 @@ package math
 
 func isOddInt(x float64) bool {
 	if Abs(x) >= (1 << 53) {
+		// 1 << 53 is the largest exact integer in the float64 format.
+		// Any number outside this range will be truncated before the decimal point and therefore will always be
+		// an even integer.
+		// Without this check and if x overflows int64 the int64(xi) conversion below may produce incorrect results
+		// on some architectures (and does so on arm64). See issue #57465.
 		return false
 	}