255768511 has 2 divisors, whose sum is σ = 255768512. Its totient is φ = 255768510.

The previous prime is 255768493. The next prime is 255768517. The reversal of 255768511 is 115867552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255768511 - 2²¹ = 253671359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255768517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127884255 + 127884256.

It is an arithmetic number, because the mean of its divisors is an integer number (127884256).

Almost surely, 2^255768511 is an apocalyptic number.

255768511 is a deficient number, since it is larger than the sum of its proper divisors (1).

255768511 is an equidigital number, since it uses as much as digits as its factorization.

255768511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 40.

The square root of 255768511 is about 15992.7643326599. The cubic root of 255768511 is about 634.7689745901.

The spelling of 255768511 in words is "two hundred fifty-five million, seven hundred sixty-eight thousand, five hundred eleven".