56515506655 has 16 divisors (see below), whose sum is σ = 68425555968. Its totient is φ = 44809524000.

The previous prime is 56515506653. The next prime is 56515506659. The reversal of 56515506655 is 55660551565.

It is not a de Polignac number, because 56515506655 - 2¹ = 56515506653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56515506599 and 56515506608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515506653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149620 + ... + 367990.

It is an arithmetic number, because the mean of its divisors is an integer number (4276597248).

Almost surely, 2^56515506655 is an apocalyptic number.

56515506655 is a deficient number, since it is larger than the sum of its proper divisors (11910049313).

56515506655 is a wasteful number, since it uses less digits than its factorization.

56515506655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218838.

The product of its (nonzero) digits is 3375000, while the sum is 49.

The spelling of 56515506655 in words is "fifty-six billion, five hundred fifteen million, five hundred six thousand, six hundred fifty-five".