25245602564 has 48 divisors (see below), whose sum is σ = 55701399936. Its totient is φ = 9743673600.

The previous prime is 25245602563. The next prime is 25245602573. The reversal of 25245602564 is 46520654252.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (25245602563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830882 + ... + 860729.

It is an arithmetic number, because the mean of its divisors is an integer number (1160445832).

Almost surely, 2^25245602564 is an apocalyptic number.

It is an amenable number.

25245602564 is an abundant number, since it is smaller than the sum of its proper divisors (30455797372).

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

25245602564 is a wasteful number, since it uses less digits than its factorization.

25245602564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691676 (or 1691674 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

The spelling of 25245602564 in words is "twenty-five billion, two hundred forty-five million, six hundred two thousand, five hundred sixty-four".