25536864 has 24 divisors (see below), whose sum is σ = 67034520. Its totient is φ = 8512256.

The previous prime is 25536853. The next prime is 25536881. The reversal of 25536864 is 46863552.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132909 + ... + 133100.

It is an arithmetic number, because the mean of its divisors is an integer number (2793105).

Almost surely, 2^25536864 is an apocalyptic number.

25536864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25536864 is an abundant number, since it is smaller than the sum of its proper divisors (41497656).

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

25536864 is a wasteful number, since it uses less digits than its factorization.

25536864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266022 (or 266014 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 25536864 is about 5053.4012308543. The cubic root of 25536864 is about 294.4800339666.

The spelling of 25536864 in words is "twenty-five million, five hundred thirty-six thousand, eight hundred sixty-four".