25617315064 has 16 divisors (see below), whose sum is σ = 52399053720. Its totient is φ = 11644234080.

The previous prime is 25617315023. The next prime is 25617315067. The reversal of 25617315064 is 46051371652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25617315067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145552839 + ... + 145553014.

Almost surely, 2^25617315064 is an apocalyptic number.

It is an amenable number.

25617315064 is an abundant number, since it is smaller than the sum of its proper divisors (26781738656).

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

25617315064 is a wasteful number, since it uses less digits than its factorization.

25617315064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291105870 (or 291105866 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 25617315064 in words is "twenty-five billion, six hundred seventeen million, three hundred fifteen thousand, sixty-four".