25572550556 has 12 divisors (see below), whose sum is σ = 51145101168. Its totient is φ = 10959664512.

The previous prime is 25572550453. The next prime is 25572550559. The reversal of 25572550556 is 65505527552.

25572550556 is an admirable number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25572550556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25572550559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456652661 + ... + 456652716.

It is an arithmetic number, because the mean of its divisors is an integer number (4262091764).

Almost surely, 2^25572550556 is an apocalyptic number.

It is an amenable number.

25572550556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25572550556 is a wasteful number, since it uses less digits than its factorization.

25572550556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913305388 (or 913305386 counting only the distinct ones).

The product of its (nonzero) digits is 2625000, while the sum is 47.

The spelling of 25572550556 in words is "twenty-five billion, five hundred seventy-two million, five hundred fifty thousand, five hundred fifty-six".