25080645636 has 18 divisors (see below), whose sum is σ = 63398298782. Its totient is φ = 8360215200.

The previous prime is 25080645587. The next prime is 25080645691. The reversal of 25080645636 is 63654608052.

25080645636 is a `hidden beast` number, since 2 + 5 + 0 + 8 + 0 + 6 + 4 + 5 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23740646400 + 1339999236 = 154080^2 + 36606^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 25080645591 and 25080645600.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 348342265 + ... + 348342336.

Almost surely, 2^25080645636 is an apocalyptic number.

It is an amenable number.

25080645636 is an abundant number, since it is smaller than the sum of its proper divisors (38317653146).

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

25080645636 is a wasteful number, since it uses less digits than its factorization.

25080645636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696684611 (or 696684606 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 25080645636 in words is "twenty-five billion, eighty million, six hundred forty-five thousand, six hundred thirty-six".