256855534032341 has 2 divisors, whose sum is σ = 256855534032342. Its totient is φ = 256855534032340.

The previous prime is 256855534032319. The next prime is 256855534032389. The reversal of 256855534032341 is 143230435558652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235172346208900 + 21683187823441 = 15335330^2 + 4656521^2 .

It is a cyclic number.

It is not a de Polignac number, because 256855534032341 - 2²⁶ = 256855466923477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256855534032301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128427767016170 + 128427767016171.

It is an arithmetic number, because the mean of its divisors is an integer number (128427767016171).

Almost surely, 2^{256855534032341} is an apocalyptic number.

It is an amenable number.

256855534032341 is a deficient number, since it is larger than the sum of its proper divisors (1).

256855534032341 is an equidigital number, since it uses as much as digits as its factorization.

256855534032341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840000, while the sum is 56.

The spelling of 256855534032341 in words is "two hundred fifty-six trillion, eight hundred fifty-five billion, five hundred thirty-four million, thirty-two thousand, three hundred forty-one".