656552787255656 has 16 divisors (see below), whose sum is σ = 1231076715718500. Its totient is φ = 328265663064064.

The previous prime is 656552787255641. The next prime is 656552787255733.

It is a happy number.

656552787255656 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 654580251274756 + 1972535980900 = 25584766^2 + 1404470^2 .

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, 1341060431 + ... + 1341549918.

Almost surely, 2^{656552787255656} is an apocalyptic number.

It is an amenable number.

656552787255656 is a deficient number, since it is larger than the sum of its proper divisors (574523928462844).

656552787255656 is a wasteful number, since it uses less digits than its factorization.

656552787255656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682640948 (or 2682640944 counting only the distinct ones).

The product of its digits is 31752000000, while the sum is 80.

The spelling of 656552787255656 in words is "six hundred fifty-six trillion, five hundred fifty-two billion, seven hundred eighty-seven million, two hundred fifty-five thousand, six hundred fifty-six".