656213216023 has 2 divisors, whose sum is σ = 656213216024. Its totient is φ = 656213216022.

The previous prime is 656213216011. The next prime is 656213216027. The reversal of 656213216023 is 320612312656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656213216023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656213216027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328106608011 + 328106608012.

It is an arithmetic number, because the mean of its divisors is an integer number (328106608012).

Almost surely, 2^656213216023 is an apocalyptic number.

656213216023 is a deficient number, since it is larger than the sum of its proper divisors (1).

656213216023 is an equidigital number, since it uses as much as digits as its factorization.

656213216023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 656213216023 its reverse (320612312656), we get a palindrome (976825528679).

The spelling of 656213216023 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred sixteen thousand, twenty-three".