255359166891 has 4 divisors (see below), whose sum is σ = 340478889192. Its totient is φ = 170239444592.

The previous prime is 255359166863. The next prime is 255359166919. The reversal of 255359166891 is 198661953552.

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

It is an interprime number because it is at equal distance from previous prime (255359166863) and next prime (255359166919).

It is a cyclic number.

It is not a de Polignac number, because 255359166891 - 2⁵ = 255359166859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255359166841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42559861146 + ... + 42559861151.

It is an arithmetic number, because the mean of its divisors is an integer number (85119722298).

Almost surely, 2^255359166891 is an apocalyptic number.

255359166891 is a deficient number, since it is larger than the sum of its proper divisors (85119722301).

255359166891 is an equidigital number, since it uses as much as digits as its factorization.

255359166891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85119722300.

The product of its digits is 17496000, while the sum is 60.

The spelling of 255359166891 in words is "two hundred fifty-five billion, three hundred fifty-nine million, one hundred sixty-six thousand, eight hundred ninety-one".