255411578317309 has 2 divisors, whose sum is σ = 255411578317310. Its totient is φ = 255411578317308.

The previous prime is 255411578317297. The next prime is 255411578317319. The reversal of 255411578317309 is 903713875114552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245849166258084 + 9562412059225 = 15679578^2 + 3092315^2 .

It is a cyclic number.

It is not a de Polignac number, because 255411578317309 - 2⁵ = 255411578317277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255411578317319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127705789158654 + 127705789158655.

It is an arithmetic number, because the mean of its divisors is an integer number (127705789158655).

Almost surely, 2^{255411578317309} is an apocalyptic number.

It is an amenable number.

255411578317309 is a deficient number, since it is larger than the sum of its proper divisors (1).

255411578317309 is an equidigital number, since it uses as much as digits as its factorization.

255411578317309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752000, while the sum is 61.

The spelling of 255411578317309 in words is "two hundred fifty-five trillion, four hundred eleven billion, five hundred seventy-eight million, three hundred seventeen thousand, three hundred nine".