256316243845339 has 2 divisors, whose sum is σ = 256316243845340. Its totient is φ = 256316243845338.

The previous prime is 256316243845307. The next prime is 256316243845381. The reversal of 256316243845339 is 933548342613652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256316243845339 - 2⁵ = 256316243845307 is a prime.

It is not a weakly prime, because it can be changed into another prime (256316243843339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128158121922669 + 128158121922670.

It is an arithmetic number, because the mean of its divisors is an integer number (128158121922670).

Almost surely, 2^{256316243845339} is an apocalyptic number.

256316243845339 is a deficient number, since it is larger than the sum of its proper divisors (1).

256316243845339 is an equidigital number, since it uses as much as digits as its factorization.

256316243845339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 335923200, while the sum is 64.

The spelling of 256316243845339 in words is "two hundred fifty-six trillion, three hundred sixteen billion, two hundred forty-three million, eight hundred forty-five thousand, three hundred thirty-nine".