656212545179 has 2 divisors, whose sum is σ = 656212545180. Its totient is φ = 656212545178.

The previous prime is 656212545173. The next prime is 656212545217. The reversal of 656212545179 is 971545212656.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656212545179 is a prime.

It is a super-2 number, since 2×656212545179² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656212545179.

It is not a weakly prime, because it can be changed into another prime (656212545173) 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, 328106272589 + 328106272590.

It is an arithmetic number, because the mean of its divisors is an integer number (328106272590).

Almost surely, 2^656212545179 is an apocalyptic number.

656212545179 is a deficient number, since it is larger than the sum of its proper divisors (1).

656212545179 is an equidigital number, since it uses as much as digits as its factorization.

656212545179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 53.

The spelling of 656212545179 in words is "six hundred fifty-six billion, two hundred twelve million, five hundred forty-five thousand, one hundred seventy-nine".