255916911 has 4 divisors (see below), whose sum is σ = 341222552. Its totient is φ = 170611272.

The previous prime is 255916907. The next prime is 255916933. The reversal of 255916911 is 119619552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255916911 - 2² = 255916907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255916911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255916981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42652816 + ... + 42652821.

It is an arithmetic number, because the mean of its divisors is an integer number (85305638).

Almost surely, 2^255916911 is an apocalyptic number.

255916911 is a deficient number, since it is larger than the sum of its proper divisors (85305641).

255916911 is an equidigital number, since it uses as much as digits as its factorization.

255916911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85305640.

The product of its digits is 24300, while the sum is 39.

The square root of 255916911 is about 15997.4032580291. The cubic root of 255916911 is about 634.8917177465.

The spelling of 255916911 in words is "two hundred fifty-five million, nine hundred sixteen thousand, nine hundred eleven".