656212545559 has 2 divisors, whose sum is σ = 656212545560. Its totient is φ = 656212545558.

The previous prime is 656212545523. The next prime is 656212545629. The reversal of 656212545559 is 955545212656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656212545559 - 2⁹ = 656212545047 is a prime.

It is a super-2 number, since 2×656212545559² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656212545509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328106272779 + 328106272780.

It is an arithmetic number, because the mean of its divisors is an integer number (328106272780).

Almost surely, 2^656212545559 is an apocalyptic number.

656212545559 is a deficient number, since it is larger than the sum of its proper divisors (1).

656212545559 is an equidigital number, since it uses as much as digits as its factorization.

656212545559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200000, while the sum is 55.

The spelling of 656212545559 in words is "six hundred fifty-six billion, two hundred twelve million, five hundred forty-five thousand, five hundred fifty-nine".