56533709918 has 24 divisors (see below), whose sum is σ = 98881057800. Its totient is φ = 24170890128.

The previous prime is 56533709851. The next prime is 56533709941. The reversal of 56533709918 is 81990733565.

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, 647333 + ... + 729456.

It is an arithmetic number, because the mean of its divisors is an integer number (4120044075).

Almost surely, 2^56533709918 is an apocalyptic number.

56533709918 is a deficient number, since it is larger than the sum of its proper divisors (42347347882).

56533709918 is a wasteful number, since it uses less digits than its factorization.

56533709918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377224 (or 1377217 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 56533709918 in words is "fifty-six billion, five hundred thirty-three million, seven hundred nine thousand, nine hundred eighteen".