25881315912 has 64 divisors (see below), whose sum is σ = 73422201600. Its totient is φ = 8443546560.

The previous prime is 25881315883. The next prime is 25881315917. The reversal of 25881315912 is 21951318852.

25881315912 is a `hidden beast` number, since 2 + 58 + 8 + 1 + 3 + 1 + 591 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (25881315917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1264539 + ... + 1284842.

It is an arithmetic number, because the mean of its divisors is an integer number (1147221900).

Almost surely, 2^25881315912 is an apocalyptic number.

It is an amenable number.

25881315912 is an abundant number, since it is smaller than the sum of its proper divisors (47540885688).

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

25881315912 is a wasteful number, since it uses less digits than its factorization.

25881315912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549443 (or 2549433 counting only the distinct ones).

The product of its digits is 172800, while the sum is 45.

The spelling of 25881315912 in words is "twenty-five billion, eight hundred eighty-one million, three hundred fifteen thousand, nine hundred twelve".