255768769 has 2 divisors, whose sum is σ = 255768770. Its totient is φ = 255768768.

The previous prime is 255768743. The next prime is 255768787. The reversal of 255768769 is 967867552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169520400 + 86248369 = 13020^2 + 9287^2 .

It is a cyclic number.

It is not a de Polignac number, because 255768769 - 2⁷ = 255768641 is a prime.

It is a super-2 number, since 2×255768769² = 130835326391550722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255768169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127884384 + 127884385.

It is an arithmetic number, because the mean of its divisors is an integer number (127884385).

Almost surely, 2^255768769 is an apocalyptic number.

It is an amenable number.

255768769 is a deficient number, since it is larger than the sum of its proper divisors (1).

255768769 is an equidigital number, since it uses as much as digits as its factorization.

255768769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 55.

The square root of 255768769 is about 15992.7723988057. The cubic root of 255768769 is about 634.7691880257.

The spelling of 255768769 in words is "two hundred fifty-five million, seven hundred sixty-eight thousand, seven hundred sixty-nine".