56818811555 has 12 divisors (see below), whose sum is σ = 74944482816. Its totient is φ = 41322771600.

The previous prime is 56818811551. The next prime is 56818811579. The reversal of 56818811555 is 55511881865.

It is a happy number.

It is not a de Polignac number, because 56818811555 - 2² = 56818811551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56818811497 and 56818811506.

It is not an unprimeable number, because it can be changed into a prime (56818811551) 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 11 ways as a sum of consecutive naturals, for example, 46957091 + ... + 46958300.

It is an arithmetic number, because the mean of its divisors is an integer number (6245373568).

Almost surely, 2^56818811555 is an apocalyptic number.

56818811555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56818811555 is a deficient number, since it is larger than the sum of its proper divisors (18125671261).

56818811555 is a wasteful number, since it uses less digits than its factorization.

56818811555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93915418 (or 93915407 counting only the distinct ones).

The product of its digits is 1920000, while the sum is 53.

The spelling of 56818811555 in words is "fifty-six billion, eight hundred eighteen million, eight hundred eleven thousand, five hundred fifty-five".