25505555572 has 12 divisors (see below), whose sum is σ = 51011111200. Its totient is φ = 10930952376.

The previous prime is 25505555557. The next prime is 25505555639. The reversal of 25505555572 is 27555550552.

25505555572 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455456322 + ... + 455456377.

Almost surely, 2^25505555572 is an apocalyptic number.

It is an amenable number.

25505555572 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.

25505555572 is a wasteful number, since it uses less digits than its factorization.

25505555572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910912710 (or 910912708 counting only the distinct ones).

The product of its (nonzero) digits is 2187500, while the sum is 46.

The spelling of 25505555572 in words is "twenty-five billion, five hundred five million, five hundred fifty-five thousand, five hundred seventy-two".