51161610612 has 48 divisors (see below), whose sum is σ = 143611543040. Its totient is φ = 13848255072.

The previous prime is 51161610587. The next prime is 51161610667. The reversal of 51161610612 is 21601616115.

It is a super-2 number, since 2×51161610612² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51161610612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16026478 + ... + 16029669.

Almost surely, 2^51161610612 is an apocalyptic number.

It is an amenable number.

51161610612 is an abundant number, since it is smaller than the sum of its proper divisors (92449932428).

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

51161610612 is a wasteful number, since it uses less digits than its factorization.

51161610612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32056180 (or 32056178 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 51161610612 in words is "fifty-one billion, one hundred sixty-one million, six hundred ten thousand, six hundred twelve".