256577375759 has 2 divisors, whose sum is σ = 256577375760. Its totient is φ = 256577375758.

The previous prime is 256577375713. The next prime is 256577375783. The reversal of 256577375759 is 957573775652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256577375759 - 2¹² = 256577371663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256577375059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128288687879 + 128288687880.

It is an arithmetic number, because the mean of its divisors is an integer number (128288687880).

Almost surely, 2^256577375759 is an apocalyptic number.

256577375759 is a deficient number, since it is larger than the sum of its proper divisors (1).

256577375759 is an equidigital number, since it uses as much as digits as its factorization.

256577375759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486202500, while the sum is 68.

The spelling of 256577375759 in words is "two hundred fifty-six billion, five hundred seventy-seven million, three hundred seventy-five thousand, seven hundred fifty-nine".