51513740832 has 24 divisors (see below), whose sum is σ = 135223569936. Its totient is φ = 17171246912.

The previous prime is 51513740819. The next prime is 51513740857. The reversal of 51513740832 is 23804731515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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, 268300638 + ... + 268300829.

It is an arithmetic number, because the mean of its divisors is an integer number (5634315414).

Almost surely, 2^51513740832 is an apocalyptic number.

It is an amenable number.

51513740832 is an abundant number, since it is smaller than the sum of its proper divisors (83709829104).

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

51513740832 is a wasteful number, since it uses less digits than its factorization.

51513740832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536601480 (or 536601472 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 51513740832 in words is "fifty-one billion, five hundred thirteen million, seven hundred forty thousand, eight hundred thirty-two".