51315983916 has 48 divisors (see below), whose sum is σ = 120400134624. Its totient is φ = 17010717696.

The previous prime is 51315983891. The next prime is 51315983933. The reversal of 51315983916 is 61938951315.

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, 7686756 + ... + 7693428.

It is an arithmetic number, because the mean of its divisors is an integer number (2508336138).

Almost surely, 2^51315983916 is an apocalyptic number.

It is an amenable number.

51315983916 is an abundant number, since it is smaller than the sum of its proper divisors (69084150708).

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

51315983916 is a wasteful number, since it uses less digits than its factorization.

51315983916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10130 (or 10128 counting only the distinct ones).

The product of its digits is 874800, while the sum is 51.

The spelling of 51315983916 in words is "fifty-one billion, three hundred fifteen million, nine hundred eighty-three thousand, nine hundred sixteen".