656565383565656 has 16 divisors (see below), whose sum is σ = 1231582393794240. Its totient is φ = 328143411887200.

The previous prime is 656565383565653. The next prime is 656565383565673.

656565383565656 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656565383565653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17409966920 + ... + 17410004631.

It is an arithmetic number, because the mean of its divisors is an integer number (76973899612140).

Almost surely, 2^{656565383565656} is an apocalyptic number.

It is an amenable number.

656565383565656 is a deficient number, since it is larger than the sum of its proper divisors (575017010228584).

656565383565656 is a wasteful number, since it uses less digits than its factorization.

656565383565656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34819973914 (or 34819973910 counting only the distinct ones).

The product of its digits is 52488000000, while the sum is 80.

The spelling of 656565383565656 in words is "six hundred fifty-six trillion, five hundred sixty-five billion, three hundred eighty-three million, five hundred sixty-five thousand, six hundred fifty-six".