25500005556 has 48 divisors (see below), whose sum is σ = 60561708480. Its totient is φ = 8348584960.

The previous prime is 25500005549. The next prime is 25500005569. The reversal of 25500005556 is 65550000552.

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, 820900 + ... + 851396.

It is an arithmetic number, because the mean of its divisors is an integer number (1261702260).

Almost surely, 2^25500005556 is an apocalyptic number.

It is an amenable number.

25500005556 is an abundant number, since it is smaller than the sum of its proper divisors (35061702924).

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

25500005556 is a wasteful number, since it uses less digits than its factorization.

25500005556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31744 (or 31742 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 33.

The spelling of 25500005556 in words is "twenty-five billion, five hundred million, five thousand, five hundred fifty-six".