51318438560 has 48 divisors (see below), whose sum is σ = 128371571496. Its totient is φ = 19319881728.

The previous prime is 51318438551. The next prime is 51318438581. The reversal of 51318438560 is 6583481315.

51318438560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 50698826896 + 619611664 = 225164^2 + 24892^2 .

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, 9430817 + ... + 9436256.

Almost surely, 2^51318438560 is an apocalyptic number.

It is an amenable number.

51318438560 is an abundant number, since it is smaller than the sum of its proper divisors (77053132936).

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

51318438560 is a wasteful number, since it uses less digits than its factorization.

51318438560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18867105 (or 18867097 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 51318438560 in words is "fifty-one billion, three hundred eighteen million, four hundred thirty-eight thousand, five hundred sixty".