51510616656164 has 72 divisors (see below), whose sum is σ = 96218378119080. Its totient is φ = 24124035088384.

The previous prime is 51510616656151. The next prime is 51510616656209. The reversal of 51510616656164 is 46165661601515.

It can be written as a sum of positive squares in 12 ways, for example, as 1089852481600 + 50420764174564 = 1043960^2 + 7100758^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207582614 + ... + 207830610.

It is an arithmetic number, because the mean of its divisors is an integer number (1336366362765).

Almost surely, 2^{51510616656164} is an apocalyptic number.

It is an amenable number.

51510616656164 is a deficient number, since it is larger than the sum of its proper divisors (44707761462916).

51510616656164 is a wasteful number, since it uses less digits than its factorization.

51510616656164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248897 (or 248878 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 51510616656164 in words is "fifty-one trillion, five hundred ten billion, six hundred sixteen million, six hundred fifty-six thousand, one hundred sixty-four".