51318330156 has 18 divisors (see below), whose sum is σ = 129721334652. Its totient is φ = 17106110040.

The previous prime is 51318330121. The next prime is 51318330163. The reversal of 51318330156 is 65103381315.

51318330156 is a `hidden beast` number, since 5 + 1 + 318 + 330 + 1 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1425509171 = 51318330156 / (5 + 1 + 3 + 1 + 8 + 3 + 3 + 0 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 51318330156.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712754550 + ... + 712754621.

It is an arithmetic number, because the mean of its divisors is an integer number (7206740814).

Almost surely, 2^51318330156 is an apocalyptic number.

It is an amenable number.

51318330156 is an abundant number, since it is smaller than the sum of its proper divisors (78403004496).

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

51318330156 is a wasteful number, since it uses less digits than its factorization.

51318330156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425509181 (or 1425509176 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 51318330156 in words is "fifty-one billion, three hundred eighteen million, three hundred thirty thousand, one hundred fifty-six".