656563131311 has 2 divisors, whose sum is σ = 656563131312. Its totient is φ = 656563131310.

The previous prime is 656563131223. The next prime is 656563131347. The reversal of 656563131311 is 113131365656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656563131311 - 2¹⁰ = 656563130287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656563131911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328281565655 + 328281565656.

It is an arithmetic number, because the mean of its divisors is an integer number (328281565656).

Almost surely, 2^656563131311 is an apocalyptic number.

656563131311 is a deficient number, since it is larger than the sum of its proper divisors (1).

656563131311 is an equidigital number, since it uses as much as digits as its factorization.

656563131311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 41.

Adding to 656563131311 its reverse (113131365656), we get a palindrome (769694496967).

The spelling of 656563131311 in words is "six hundred fifty-six billion, five hundred sixty-three million, one hundred thirty-one thousand, three hundred eleven".