656122569252 has 12 divisors (see below), whose sum is σ = 1530952661616. Its totient is φ = 218707523080.

The previous prime is 656122569241. The next prime is 656122569253. The reversal of 656122569252 is 252965221656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 656122569195 and 656122569204.

It is not an unprimeable number, because it can be changed into a prime (656122569253) 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 3 ways as a sum of consecutive naturals, for example, 27338440374 + ... + 27338440397.

It is an arithmetic number, because the mean of its divisors is an integer number (127579388468).

Almost surely, 2^656122569252 is an apocalyptic number.

It is an amenable number.

656122569252 is an abundant number, since it is smaller than the sum of its proper divisors (874830092364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656122569252 is a wasteful number, since it uses less digits than its factorization.

656122569252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54676880778 (or 54676880776 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 51.

The spelling of 656122569252 in words is "six hundred fifty-six billion, one hundred twenty-two million, five hundred sixty-nine thousand, two hundred fifty-two".