656563131223 has 2 divisors, whose sum is σ = 656563131224. Its totient is φ = 656563131222.

The previous prime is 656563131199. The next prime is 656563131311. The reversal of 656563131223 is 322131365656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656563131223 - 2¹³ = 656563123031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 656563131223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656563131823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328281565611 + 328281565612.

It is an arithmetic number, because the mean of its divisors is an integer number (328281565612).

Almost surely, 2^656563131223 is an apocalyptic number.

656563131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

656563131223 is an equidigital number, since it uses as much as digits as its factorization.

656563131223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 43.

Adding to 656563131223 its reverse (322131365656), we get a palindrome (978694496879).

The spelling of 656563131223 in words is "six hundred fifty-six billion, five hundred sixty-three million, one hundred thirty-one thousand, two hundred twenty-three".