656236522213 has 8 divisors (see below), whose sum is σ = 697481844800. Its totient is φ = 615661855488.

The previous prime is 656236522199. The next prime is 656236522217. The reversal of 656236522213 is 312225632656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656236522213 - 2⁹ = 656236521701 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 656236522213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656236522217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167661948 + ... + 167665861.

It is an arithmetic number, because the mean of its divisors is an integer number (87185230600).

Almost surely, 2^656236522213 is an apocalyptic number.

It is an amenable number.

656236522213 is a deficient number, since it is larger than the sum of its proper divisors (41245322587).

656236522213 is a wasteful number, since it uses less digits than its factorization.

656236522213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335327931.

The product of its digits is 777600, while the sum is 43.

The spelling of 656236522213 in words is "six hundred fifty-six billion, two hundred thirty-six million, five hundred twenty-two thousand, two hundred thirteen".