255663769 has 2 divisors, whose sum is σ = 255663770. Its totient is φ = 255663768.

The previous prime is 255663763. The next prime is 255663809. The reversal of 255663769 is 967366552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254817369 + 846400 = 15963^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 255663769 - 2⁹ = 255663257 is a prime.

It is a super-2 number, since 2×255663769² = 130727925558570722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255663763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127831884 + 127831885.

It is an arithmetic number, because the mean of its divisors is an integer number (127831885).

Almost surely, 2^255663769 is an apocalyptic number.

It is an amenable number.

255663769 is a deficient number, since it is larger than the sum of its proper divisors (1).

255663769 is an equidigital number, since it uses as much as digits as its factorization.

255663769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 49.

The square root of 255663769 is about 15989.4893289311. The cubic root of 255663769 is about 634.6823128276.

The spelling of 255663769 in words is "two hundred fifty-five million, six hundred sixty-three thousand, seven hundred sixty-nine".