51660516156 has 24 divisors (see below), whose sum is σ = 120568581504. Its totient is φ = 17216261040.

The previous prime is 51660516137. The next prime is 51660516157. The reversal of 51660516156 is 65161506615.

51660516156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51660516157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433590 + ... + 539741.

It is an arithmetic number, because the mean of its divisors is an integer number (5023690896).

Almost surely, 2^51660516156 is an apocalyptic number.

It is an amenable number.

51660516156 is an abundant number, since it is smaller than the sum of its proper divisors (68908065348).

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

51660516156 is a wasteful number, since it uses less digits than its factorization.

51660516156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977761 (or 977759 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 51660516156 in words is "fifty-one billion, six hundred sixty million, five hundred sixteen thousand, one hundred fifty-six".