56613213855 has 96 divisors (see below), whose sum is σ = 112856260608. Its totient is φ = 25997875200.

The previous prime is 56613213829. The next prime is 56613213871. The reversal of 56613213855 is 55831231665.

56613213855 is a `hidden beast` number, since 5 + 6 + 613 + 21 + 3 + 8 + 5 + 5 = 666.

It is not a de Polignac number, because 56613213855 - 2⁶ = 56613213791 is a prime.

It is a super-2 number, since 2×56613213855² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56613213855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 681967 + ... + 760463.

It is an arithmetic number, because the mean of its divisors is an integer number (1175586048).

Almost surely, 2^56613213855 is an apocalyptic number.

56613213855 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56613213855 is a deficient number, since it is larger than the sum of its proper divisors (56243046753).

56613213855 is a wasteful number, since it uses less digits than its factorization.

56613213855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78597 (or 78594 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 56613213855 in words is "fifty-six billion, six hundred thirteen million, two hundred thirteen thousand, eight hundred fifty-five".