656563131284 has 12 divisors (see below), whose sum is σ = 1149320192244. Its totient is φ = 328185933504.

The previous prime is 656563131223. The next prime is 656563131311. The reversal of 656563131284 is 482131365656.

It is a happy number.

656563131284 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 2 ways, for example, as 465366823684 + 191196307600 = 682178^2 + 437260^2 .

It is a super-2 number, since 2×656563131284² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23892587 + ... + 23920050.

It is an arithmetic number, because the mean of its divisors is an integer number (95776682687).

Almost surely, 2^656563131284 is an apocalyptic number.

It is an amenable number.

656563131284 is a deficient number, since it is larger than the sum of its proper divisors (492757060960).

656563131284 is a wasteful number, since it uses less digits than its factorization.

656563131284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47816074 (or 47816072 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The spelling of 656563131284 in words is "six hundred fifty-six billion, five hundred sixty-three million, one hundred thirty-one thousand, two hundred eighty-four".