25664604 has 48 divisors (see below), whose sum is σ = 68748288. Its totient is φ = 7299648.

The previous prime is 25664599. The next prime is 25664629. The reversal of 25664604 is 40646652.

25664604 = 607² + 608² + ... + 669².

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 22717 + ... + 23819.

It is an arithmetic number, because the mean of its divisors is an integer number (1432256).

Almost surely, 2^25664604 is an apocalyptic number.

It is an amenable number.

25664604 is an abundant number, since it is smaller than the sum of its proper divisors (43083684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25664604 is a wasteful number, since it uses less digits than its factorization.

25664604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1392 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 25664604 is about 5066.0244768457. The cubic root of 25664604 is about 294.9702316031.

The spelling of 25664604 in words is "twenty-five million, six hundred sixty-four thousand, six hundred four".