diff --git a/number.go b/number.go
index 3214134..dec6186 100644
--- a/number.go
+++ b/number.go
@@ -160,7 +160,7 @@
 	intf, fracf := math.Modf(n + renderFloatPrecisionRounders[precision])
 
 	// generate integer part string
-	intStr := strconv.Itoa(int(intf))
+	intStr := strconv.FormatInt(int64(intf), 10)
 
 	// add thousand separator if required
 	if len(thousandStr) > 0 {
diff --git a/number_test.go b/number_test.go
index dd38a5b..516f337 100644
--- a/number_test.go
+++ b/number_test.go
@@ -25,6 +25,7 @@
 		{"#,###.###", "#,###.###", 12345.6789, "12,345.679"},
 		{"#,###.####", "#,###.####", 12345.6789, "12,345.6789"},
 		{"#.###,######", "#.###,######", 12345.6789, "12.345,678900"},
+		{"bug46", "#,###.##", 52746220055.92342, "52,746,220,055.92"},
 		{"#\u202f###,##", "#\u202f###,##", 12345.6789, "12 345,68"},
 
 		// special cases