656155655005 has 4 divisors (see below), whose sum is σ = 787386786012. Its totient is φ = 524924524000.

The previous prime is 656155654967. The next prime is 656155655017. The reversal of 656155655005 is 500556551656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 429650097529 + 226505557476 = 655477^2 + 475926^2 .

It is not a de Polignac number, because 656155655005 - 2²⁷ = 656021437277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 656155655005.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 65615565496 + ... + 65615565505.

It is an arithmetic number, because the mean of its divisors is an integer number (196846696503).

Almost surely, 2^656155655005 is an apocalyptic number.

It is an amenable number.

656155655005 is a deficient number, since it is larger than the sum of its proper divisors (131231131007).

656155655005 is a wasteful number, since it uses less digits than its factorization.

656155655005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131231131006.

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

The spelling of 656155655005 in words is "six hundred fifty-six billion, one hundred fifty-five million, six hundred fifty-five thousand, five".