6556788876555 has 16 divisors (see below), whose sum is σ = 11656513558560. Its totient is φ = 3496954067424.

The previous prime is 6556788876509. The next prime is 6556788876571. The reversal of 6556788876555 is 5556788876556.

6556788876555 is a `hidden beast` number, since 6 + 5 + 56 + 7 + 8 + 8 + 8 + 7 + 6 + 555 = 666.

It is not a de Polignac number, because 6556788876555 - 2⁷ = 6556788876427 is a prime.

It is a super-3 number, since 3×6556788876555³ (a number of 39 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24284403112 + ... + 24284403381.

It is an arithmetic number, because the mean of its divisors is an integer number (728532097410).

Almost surely, 2^{6556788876555} is an apocalyptic number.

6556788876555 is a deficient number, since it is larger than the sum of its proper divisors (5099724682005).

6556788876555 is a wasteful number, since it uses less digits than its factorization.

6556788876555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48568806507 (or 48568806501 counting only the distinct ones).

The product of its digits is 16934400000, while the sum is 81.

Subtracting from 6556788876555 its reverse (5556788876556), we obtain a palindrome (999999999999).

The spelling of 6556788876555 in words is "six trillion, five hundred fifty-six billion, seven hundred eighty-eight million, eight hundred seventy-six thousand, five hundred fifty-five".