How is the Number of value 0x80000000 organised in JavaScript?

As far as I know, JavaScript's Number holds a max value of 2^53 - 1, which is far more than 0x80000000 in case of absolute value.

But here's the code:

let N = 2147483648
console.log(N >> 1)

prints:

-1073741824

What I expected is:

let N = 2147483648
// 1000 0000 0000 0000 0000 0000 0000 0000
N >>= 1
// 0100 0000 0000 0000 0000 0000 0000 0000

The only rule I know may cause this is the bit of sign is filled with 1, if so, how can it be filled with 1 since left / right shift should fill bits with 0. Is there any thing to do with the rule that builds the float?