256231288380719 has 2 divisors, whose sum is σ = 256231288380720. Its totient is φ = 256231288380718.

The previous prime is 256231288380707. The next prime is 256231288380797. The reversal of 256231288380719 is 917083882132652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256231288380719 - 2²⁰ = 256231287332143 is a prime.

It is a super-2 number, since 2×256231288380719² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256231288380919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128115644190359 + 128115644190360.

It is an arithmetic number, because the mean of its divisors is an integer number (128115644190360).

Almost surely, 2^{256231288380719} is an apocalyptic number.

256231288380719 is a deficient number, since it is larger than the sum of its proper divisors (1).

256231288380719 is an equidigital number, since it uses as much as digits as its factorization.

256231288380719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 256231288380719 in words is "two hundred fifty-six trillion, two hundred thirty-one billion, two hundred eighty-eight million, three hundred eighty thousand, seven hundred nineteen".