25391968672 has 48 divisors (see below), whose sum is σ = 60492640320. Its totient is φ = 10242137088.

The previous prime is 25391968661. The next prime is 25391968729. The reversal of 25391968672 is 27686919352.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3330222 + ... + 3337837.

It is an arithmetic number, because the mean of its divisors is an integer number (1260263340).

Almost surely, 2^25391968672 is an apocalyptic number.

It is an amenable number.

25391968672 is an abundant number, since it is smaller than the sum of its proper divisors (35100671648).

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

25391968672 is a wasteful number, since it uses less digits than its factorization.

25391968672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6668093 (or 6668085 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 58.

The spelling of 25391968672 in words is "twenty-five billion, three hundred ninety-one million, nine hundred sixty-eight thousand, six hundred seventy-two".