51554660056 has 32 divisors (see below), whose sum is σ = 97242097680. Its totient is φ = 25623561600.

The previous prime is 51554660041. The next prime is 51554660099. The reversal of 51554660056 is 65006645515.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51554659994 and 51554660021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3947970 + ... + 3961006.

Almost surely, 2^51554660056 is an apocalyptic number.

It is an amenable number.

51554660056 is a deficient number, since it is larger than the sum of its proper divisors (45687437624).

51554660056 is a wasteful number, since it uses less digits than its factorization.

51554660056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15955 (or 15951 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 51554660056 in words is "fifty-one billion, five hundred fifty-four million, six hundred sixty thousand, fifty-six".