255749865 has 24 divisors (see below), whose sum is σ = 476009280. Its totient is φ = 116913888.

The previous prime is 255749843. The next prime is 255749873. The reversal of 255749865 is 568947552.

It is not a de Polignac number, because 255749865 - 2⁶ = 255749801 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173245 + ... + 174714.

It is an arithmetic number, because the mean of its divisors is an integer number (19833720).

Almost surely, 2^255749865 is an apocalyptic number.

It is an amenable number.

255749865 is a deficient number, since it is larger than the sum of its proper divisors (220259415).

255749865 is a wasteful number, since it uses less digits than its factorization.

255749865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347981 (or 347974 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 51.

The square root of 255749865 is about 15992.1813709075. The cubic root of 255749865 is about 634.7535489357.

The spelling of 255749865 in words is "two hundred fifty-five million, seven hundred forty-nine thousand, eight hundred sixty-five".