255850865 has 16 divisors (see below), whose sum is σ = 331067520. Its totient is φ = 189175680.

The previous prime is 255850849. The next prime is 255850891. The reversal of 255850865 is 568058552.

It is not a de Polignac number, because 255850865 - 2⁴ = 255850849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28949 + ... + 36738.

It is an arithmetic number, because the mean of its divisors is an integer number (20691720).

Almost surely, 2^255850865 is an apocalyptic number.

It is an amenable number.

255850865 is a deficient number, since it is larger than the sum of its proper divisors (75216655).

255850865 is a wasteful number, since it uses less digits than its factorization.

255850865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65752.

The product of its (nonzero) digits is 480000, while the sum is 44.

The square root of 255850865 is about 15995.3388523032. The cubic root of 255850865 is about 634.8370962863.

The spelling of 255850865 in words is "two hundred fifty-five million, eight hundred fifty thousand, eight hundred sixty-five".