Number.MAX_SAFE_INTEGER
The maximum safe integer in JavaScript (2^53 - 1).
Syntax
Number.MAX_SAFE_INTEGERReturns
number — The constant 9007199254740991.
Examples
console.log(Number.MAX_SAFE_INTEGER);
Output
9007199254740991
console.log(Number.MAX_SAFE_INTEGER + 1 === Number.MAX_SAFE_INTEGER + 2);
Output
true
Notes
Beyond this value, integer arithmetic loses precision (note the example where
+1 and +2 compare equal). Use BigInt for larger exact integers. It is a
static, non-writable property.
Browser & runtime support
| Environment | Since version |
|---|---|
| chrome | 34 |
| firefox | 31 |
| safari | 9 |
| edge | 12 |
| node | 0.12 |