656117636 has 6 divisors (see below), whose sum is σ = 1148205870. Its totient is φ = 328058816.

The previous prime is 656117617. The next prime is 656117639. The reversal of 656117636 is 636711656.

656117636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 630311236 + 25806400 = 25106^2 + 5080^2 .

It is a junction number, because it is equal to n+sod(n) for n = 656117593 and 656117602.

It is not an unprimeable number, because it can be changed into a prime (656117639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82014701 + ... + 82014708.

It is an arithmetic number, because the mean of its divisors is an integer number (191367645).

Almost surely, 2^656117636 is an apocalyptic number.

It is an amenable number.

656117636 is a deficient number, since it is larger than the sum of its proper divisors (492088234).

656117636 is a wasteful number, since it uses less digits than its factorization.

656117636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164029413 (or 164029411 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 656117636 is about 25614.7933038703. The cubic root of 656117636 is about 868.9482317958.

The spelling of 656117636 in words is "six hundred fifty-six million, one hundred seventeen thousand, six hundred thirty-six".