51165658612 has 6 divisors (see below), whose sum is σ = 89539902578. Its totient is φ = 25582829304.

The previous prime is 51165658589. The next prime is 51165658669. The reversal of 51165658612 is 21685656115.

It can be written as a sum of positive squares in only one way, i.e., 51164630416 + 1028196 = 226196^2 + 1014^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6395707323 + ... + 6395707330.

Almost surely, 2^51165658612 is an apocalyptic number.

It is an amenable number.

51165658612 is a deficient number, since it is larger than the sum of its proper divisors (38374243966).

51165658612 is a wasteful number, since it uses less digits than its factorization.

51165658612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12791414657 (or 12791414655 counting only the distinct ones).

The product of its digits is 432000, while the sum is 46.

The spelling of 51165658612 in words is "fifty-one billion, one hundred sixty-five million, six hundred fifty-eight thousand, six hundred twelve".