25664356 has 27 divisors (see below), whose sum is σ = 48032299. Its totient is φ = 11996288.

The previous prime is 25664323. The next prime is 25664363. The reversal of 25664356 is 65346652.

The square root of 25664356 is 5066.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 504100 + 25160256 = 710^2 + 5016^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 172170 + ... + 172318.

Almost surely, 2^25664356 is an apocalyptic number.

25664356 is the 5066-th square number.

It is an amenable number.

25664356 is a deficient number, since it is larger than the sum of its proper divisors (22367943).

25664356 is a wasteful number, since it uses less digits than its factorization.

25664356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 168 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The cubic root of 25664356 is about 294.9692814897.

Multiplying 25664356 by its product of digits (129600), we get a square (3326100537600 = 1823760²).

The spelling of 25664356 in words is "twenty-five million, six hundred sixty-four thousand, three hundred fifty-six".