656243650313 has 2 divisors, whose sum is σ = 656243650314. Its totient is φ = 656243650312.

The previous prime is 656243650259. The next prime is 656243650409. The reversal of 656243650313 is 313056342656.

656243650313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445426764409 + 210816885904 = 667403^2 + 459148^2 .

It is a cyclic number.

It is not a de Polignac number, because 656243650313 - 2⁸ = 656243650057 is a prime.

It is a super-2 number, since 2×656243650313² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (656243650213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328121825156 + 328121825157.

It is an arithmetic number, because the mean of its divisors is an integer number (328121825157).

Almost surely, 2^656243650313 is an apocalyptic number.

It is an amenable number.

656243650313 is a deficient number, since it is larger than the sum of its proper divisors (1).

656243650313 is an equidigital number, since it uses as much as digits as its factorization.

656243650313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 44.

Adding to 656243650313 its reverse (313056342656), we get a palindrome (969299992969).

The spelling of 656243650313 in words is "six hundred fifty-six billion, two hundred forty-three million, six hundred fifty thousand, three hundred thirteen".