25920971824 has 40 divisors (see below), whose sum is σ = 54824616000. Its totient is φ = 11774280000.

The previous prime is 25920971819. The next prime is 25920971837. The reversal of 25920971824 is 42817902952.

It is a happy number.

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, 214699 + ... + 312949.

It is an arithmetic number, because the mean of its divisors is an integer number (1370615400).

Almost surely, 2^25920971824 is an apocalyptic number.

It is an amenable number.

25920971824 is an abundant number, since it is smaller than the sum of its proper divisors (28903644176).

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

25920971824 is a wasteful number, since it uses less digits than its factorization.

25920971824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99769 (or 99763 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 25920971824 in words is "twenty-five billion, nine hundred twenty million, nine hundred seventy-one thousand, eight hundred twenty-four".