51660655056 has 60 divisors (see below), whose sum is σ = 144595432800. Its totient is φ = 17218152000.

The previous prime is 51660655049. The next prime is 51660655099. The reversal of 51660655056 is 65055606615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1611181 + ... + 1642931.

It is an arithmetic number, because the mean of its divisors is an integer number (2409923880).

Almost surely, 2^51660655056 is an apocalyptic number.

It is an amenable number.

51660655056 is an abundant number, since it is smaller than the sum of its proper divisors (92934777744).

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

51660655056 is a wasteful number, since it uses less digits than its factorization.

51660655056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43064 (or 43055 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 51660655056 in words is "fifty-one billion, six hundred sixty million, six hundred fifty-five thousand, fifty-six".