25845242556 has 48 divisors (see below), whose sum is σ = 72548053760. Its totient is φ = 6995704320.

The previous prime is 25845242543. The next prime is 25845242573. The reversal of 25845242556 is 65524254852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8095285 + ... + 8098476.

Almost surely, 2^25845242556 is an apocalyptic number.

It is an amenable number.

25845242556 is an abundant number, since it is smaller than the sum of its proper divisors (46702811204).

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

25845242556 is a wasteful number, since it uses less digits than its factorization.

25845242556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16193794 (or 16193792 counting only the distinct ones).

The product of its digits is 3840000, while the sum is 48.

The spelling of 25845242556 in words is "twenty-five billion, eight hundred forty-five million, two hundred forty-two thousand, five hundred fifty-six".