51139155960 has 96 divisors (see below), whose sum is σ = 167063635440. Its totient is φ = 13566431232.

The previous prime is 51139155953. The next prime is 51139155989. The reversal of 51139155960 is 6955193115.

51139155960 is a `hidden beast` number, since 5 + 1 + 1 + 3 + 91 + 559 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298534 + ... + 437493.

Almost surely, 2^51139155960 is an apocalyptic number.

It is an amenable number.

51139155960 is an abundant number, since it is smaller than the sum of its proper divisors (115924479480).

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

51139155960 is a wasteful number, since it uses less digits than its factorization.

51139155960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736237 (or 736230 counting only the distinct ones).

The product of its (nonzero) digits is 182250, while the sum is 45.

The spelling of 51139155960 in words is "fifty-one billion, one hundred thirty-nine million, one hundred fifty-five thousand, nine hundred sixty".