268510398613 has 2 divisors, whose sum is σ = 268510398614. Its totient is φ = 268510398612.

The previous prime is 268510398581. The next prime is 268510398623. The reversal of 268510398613 is 316893015862.

268510398613 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., 137913448689 + 130596949924 = 371367^2 + 361382^2 .

It is a cyclic number.

It is not a de Polignac number, because 268510398613 - 2⁵ = 268510398581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268510398623) 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, 134255199306 + 134255199307.

It is an arithmetic number, because the mean of its divisors is an integer number (134255199307).

Almost surely, 2^268510398613 is an apocalyptic number.

It is an amenable number.

268510398613 is a deficient number, since it is larger than the sum of its proper divisors (1).

268510398613 is an equidigital number, since it uses as much as digits as its factorization.

268510398613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 268510398613 in words is "two hundred sixty-eight billion, five hundred ten million, three hundred ninety-eight thousand, six hundred thirteen".