56718902818 has 16 divisors (see below), whose sum is σ = 85766022144. Its totient is φ = 28130321520.

The previous prime is 56718902813. The next prime is 56718902857. The reversal of 56718902818 is 81820981765.

It is a super-2 number, since 2×56718902818² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56718902813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1370773 + ... + 1411543.

It is an arithmetic number, because the mean of its divisors is an integer number (5360376384).

Almost surely, 2^56718902818 is an apocalyptic number.

56718902818 is a deficient number, since it is larger than the sum of its proper divisors (29047119326).

56718902818 is a wasteful number, since it uses less digits than its factorization.

56718902818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46377.

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 56718902818 in words is "fifty-six billion, seven hundred eighteen million, nine hundred two thousand, eight hundred eighteen".