56551665100 has 72 divisors (see below), whose sum is σ = 141318955008. Its totient is φ = 19241102400.

The previous prime is 56551665089. The next prime is 56551665103. The reversal of 56551665100 is 156615565.

It is not an unprimeable number, because it can be changed into a prime (56551665103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216652 + ... + 400051.

It is an arithmetic number, because the mean of its divisors is an integer number (1962763264).

Almost surely, 2^56551665100 is an apocalyptic number.

56551665100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56551665100 is an abundant number, since it is smaller than the sum of its proper divisors (84767289908).

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

56551665100 is a wasteful number, since it uses less digits than its factorization.

56551665100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616855 (or 616848 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 56551665100 in words is "fifty-six billion, five hundred fifty-one million, six hundred sixty-five thousand, one hundred".