6556861015755 has 16 divisors (see below), whose sum is σ = 10492765899264. Its totient is φ = 3496396450400.

The previous prime is 6556861015681. The next prime is 6556861015777. The reversal of 6556861015755 is 5575101686556.

It is not a de Polignac number, because 6556861015755 - 2²³ = 6556852627147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37164771 + ... + 37340780.

It is an arithmetic number, because the mean of its divisors is an integer number (655797868704).

Almost surely, 2^{6556861015755} is an apocalyptic number.

6556861015755 is a deficient number, since it is larger than the sum of its proper divisors (3935904883509).

6556861015755 is a wasteful number, since it uses less digits than its factorization.

6556861015755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74511426.

The product of its (nonzero) digits is 37800000, while the sum is 60.

The spelling of 6556861015755 in words is "six trillion, five hundred fifty-six billion, eight hundred sixty-one million, fifteen thousand, seven hundred fifty-five".