25045536564 has 36 divisors (see below), whose sum is σ = 63367892224. Its totient is φ = 8340818832.

The previous prime is 25045536563. The next prime is 25045536601. The reversal of 25045536564 is 46563554052.

25045536564 is a `hidden beast` number, since 2 + 5 + 0 + 4 + 55 + 36 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25045536563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280882 + ... + 359145.

Almost surely, 2^25045536564 is an apocalyptic number.

It is an amenable number.

25045536564 is an abundant number, since it is smaller than the sum of its proper divisors (38322355660).

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

25045536564 is a wasteful number, since it uses less digits than its factorization.

25045536564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641124 (or 641119 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

The spelling of 25045536564 in words is "twenty-five billion, forty-five million, five hundred thirty-six thousand, five hundred sixty-four".