JavaScript MAX_SAFE_INTEGER

let x = Number.MAX_SAFE_INTEGER;

Description

Number.MAX_SAFE_INTEGER represents the maximum safe integer in JavaScript.

Number.MAX_SAFE_INTEGER is (2⁵³ - 1).

MAX_SAFE_INTEGER is a property of the JavaScript Number object.

You can only use it as Number.MAX_SAFE_INTEGER.

Using x.MAX_VALUE, where x is a variable, will return undefined:

let x = 100;
x.MAX_SAFE_INTEGER;

Number.MAX_SAFE_INTEGER

Type	Description
Number	9007199254740991

Number.MAX_SAFE_INTEGER is an ECMAScript6 (ES6) feature.

ES6 (JavaScript 2015) is supported in all modern browsers:


Chrome	Edge	Firefox	Safari	Opera
Yes	Yes	Yes	Yes	Yes

Number.MAX_SAFE_INTEGER is not supported in Internet Explorer 11 (or earlier).