25997974116 has 48 divisors (see below), whose sum is σ = 61352121600. Its totient is φ = 8567741952.

The previous prime is 25997974103. The next prime is 25997974127. The reversal of 25997974116 is 61147979952.

It is a self number, because there is not a number n which added to its sum of digits gives 25997974116.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584140 + ... + 627068.

It is an arithmetic number, because the mean of its divisors is an integer number (1278169200).

Almost surely, 2^25997974116 is an apocalyptic number.

It is an amenable number.

25997974116 is an abundant number, since it is smaller than the sum of its proper divisors (35354147484).

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

25997974116 is a wasteful number, since it uses less digits than its factorization.

25997974116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43508 (or 43506 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 60.

The spelling of 25997974116 in words is "twenty-five billion, nine hundred ninety-seven million, nine hundred seventy-four thousand, one hundred sixteen".