56555566556 has 12 divisors (see below), whose sum is σ = 100084289760. Its totient is φ = 27960055200.

The previous prime is 56555566549. The next prime is 56555566567. The reversal of 56555566556 is 65566555565.

It is a happy number.

It is a super-2 number, since 2×56555566556² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56555566495 and 56555566504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79431620 + ... + 79432331.

It is an arithmetic number, because the mean of its divisors is an integer number (8340357480).

Almost surely, 2^56555566556 is an apocalyptic number.

It is an amenable number.

56555566556 is a deficient number, since it is larger than the sum of its proper divisors (43528723204).

56555566556 is a wasteful number, since it uses less digits than its factorization.

56555566556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158864044 (or 158864042 counting only the distinct ones).

The product of its digits is 101250000, while the sum is 59.

The spelling of 56555566556 in words is "fifty-six billion, five hundred fifty-five million, five hundred sixty-six thousand, five hundred fifty-six".