656733268889 has 2 divisors, whose sum is σ = 656733268890. Its totient is φ = 656733268888.

The previous prime is 656733268813. The next prime is 656733268907. The reversal of 656733268889 is 988862337656.

656733268889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503936713225 + 152796555664 = 709885^2 + 390892^2 .

It is a cyclic number.

It is not a de Polignac number, because 656733268889 - 2¹⁶ = 656733203353 is a prime.

It is not a weakly prime, because it can be changed into another prime (656733228889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328366634444 + 328366634445.

It is an arithmetic number, because the mean of its divisors is an integer number (328366634445).

Almost surely, 2^656733268889 is an apocalyptic number.

It is an amenable number.

656733268889 is a deficient number, since it is larger than the sum of its proper divisors (1).

656733268889 is an equidigital number, since it uses as much as digits as its factorization.

656733268889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 627056640, while the sum is 71.

The spelling of 656733268889 in words is "six hundred fifty-six billion, seven hundred thirty-three million, two hundred sixty-eight thousand, eight hundred eighty-nine".