25664981032 has 32 divisors (see below), whose sum is σ = 50571813600. Its totient is φ = 12195296064.

The previous prime is 25664981009. The next prime is 25664981077. The reversal of 25664981032 is 23018946652.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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, 995482 + ... + 1020937.

It is an arithmetic number, because the mean of its divisors is an integer number (1580369175).

Almost surely, 2^25664981032 is an apocalyptic number.

It is an amenable number.

25664981032 is a deficient number, since it is larger than the sum of its proper divisors (24906832568).

25664981032 is a wasteful number, since it uses less digits than its factorization.

25664981032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016505 (or 2016501 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 25664981032 in words is "twenty-five billion, six hundred sixty-four million, nine hundred eighty-one thousand, thirty-two".