51157977892 has 12 divisors (see below), whose sum is σ = 102315955840. Its totient is φ = 21924847656.

The previous prime is 51157977877. The next prime is 51157977917. The reversal of 51157977892 is 29877975115.

51157977892 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 51157977892.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913535292 + ... + 913535347.

Almost surely, 2^51157977892 is an apocalyptic number.

It is an amenable number.

51157977892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51157977892 is a wasteful number, since it uses less digits than its factorization.

51157977892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827070650 (or 1827070648 counting only the distinct ones).

The product of its digits is 11113200, while the sum is 61.

The spelling of 51157977892 in words is "fifty-one billion, one hundred fifty-seven million, nine hundred seventy-seven thousand, eight hundred ninety-two".