25664562 has 48 divisors (see below), whose sum is σ = 69331392. Its totient is φ = 6665760.

The previous prime is 25664557. The next prime is 25664599. The reversal of 25664562 is 26546652.

25664562 is a `hidden beast` number, since 2 + 5 + 6 + 645 + 6 + 2 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7873 + ... + 10644.

It is an arithmetic number, because the mean of its divisors is an integer number (1444404).

Almost surely, 2^25664562 is an apocalyptic number.

25664562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25664562 is an abundant number, since it is smaller than the sum of its proper divisors (43666830).

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

25664562 is a wasteful number, since it uses less digits than its factorization.

25664562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18543 (or 18540 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 25664562 is about 5066.0203315818. The cubic root of 25664562 is about 294.9700706972.

The spelling of 25664562 in words is "twenty-five million, six hundred sixty-four thousand, five hundred sixty-two".