256241867759 has 2 divisors, whose sum is σ = 256241867760. Its totient is φ = 256241867758.

The previous prime is 256241867753. The next prime is 256241867809. The reversal of 256241867759 is 957768142652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256241867759 - 2²⁴ = 256225090543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256241867753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128120933879 + 128120933880.

It is an arithmetic number, because the mean of its divisors is an integer number (128120933880).

Almost surely, 2^256241867759 is an apocalyptic number.

256241867759 is a deficient number, since it is larger than the sum of its proper divisors (1).

256241867759 is an equidigital number, since it uses as much as digits as its factorization.

256241867759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 62.

The spelling of 256241867759 in words is "two hundred fifty-six billion, two hundred forty-one million, eight hundred sixty-seven thousand, seven hundred fifty-nine".