656563131285 has 16 divisors (see below), whose sum is σ = 1050709605120. Its totient is φ = 350097471680.

The previous prime is 656563131223. The next prime is 656563131311. The reversal of 656563131285 is 582131365656.

It is not a de Polignac number, because 656563131285 - 2⁷ = 656563131157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4267626 + ... + 4418795.

It is an arithmetic number, because the mean of its divisors is an integer number (65669350320).

Almost surely, 2^656563131285 is an apocalyptic number.

It is an amenable number.

656563131285 is a deficient number, since it is larger than the sum of its proper divisors (394146473835).

656563131285 is a wasteful number, since it uses less digits than its factorization.

656563131285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8691468.

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

The spelling of 656563131285 in words is "six hundred fifty-six billion, five hundred sixty-three million, one hundred thirty-one thousand, two hundred eighty-five".