25776564 has 24 divisors (see below), whose sum is σ = 65613408. Its totient is φ = 7811040.

The previous prime is 25776547. The next prime is 25776571. The reversal of 25776564 is 46567752.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97507 + ... + 97770.

It is an arithmetic number, because the mean of its divisors is an integer number (2733892).

Almost surely, 2^25776564 is an apocalyptic number.

It is an amenable number.

25776564 is an abundant number, since it is smaller than the sum of its proper divisors (39836844).

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

25776564 is a wasteful number, since it uses less digits than its factorization.

25776564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195295 (or 195293 counting only the distinct ones).

The product of its digits is 352800, while the sum is 42.

The square root of 25776564 is about 5077.0625365461. The cubic root of 25776564 is about 295.3985382351.

The spelling of 25776564 in words is "twenty-five million, seven hundred seventy-six thousand, five hundred sixty-four".