256159318656611 has 2 divisors, whose sum is σ = 256159318656612. Its totient is φ = 256159318656610.

The previous prime is 256159318656529. The next prime is 256159318656617. The reversal of 256159318656611 is 116656813951652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256159318656611 - 2⁴² = 251761272145507 is a prime.

It is not a weakly prime, because it can be changed into another prime (256159318656617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128079659328305 + 128079659328306.

It is an arithmetic number, because the mean of its divisors is an integer number (128079659328306).

Almost surely, 2^{256159318656611} is an apocalyptic number.

256159318656611 is a deficient number, since it is larger than the sum of its proper divisors (1).

256159318656611 is an equidigital number, since it uses as much as digits as its factorization.

256159318656611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984000, while the sum is 65.

The spelling of 256159318656611 in words is "two hundred fifty-six trillion, one hundred fifty-nine billion, three hundred eighteen million, six hundred fifty-six thousand, six hundred eleven".