255886341991 has 8 divisors (see below), whose sum is σ = 292470452384. Its totient is φ = 219309461280.

The previous prime is 255886341979. The next prime is 255886342021. The reversal of 255886341991 is 199143688552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255886341991 - 2⁵ = 255886341959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255886341091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731360 + ... + 1873333.

It is an arithmetic number, because the mean of its divisors is an integer number (36558806548).

Almost surely, 2^255886341991 is an apocalyptic number.

255886341991 is a deficient number, since it is larger than the sum of its proper divisors (36584110393).

255886341991 is a wasteful number, since it uses less digits than its factorization.

255886341991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614841.

The product of its digits is 18662400, while the sum is 61.

The spelling of 255886341991 in words is "two hundred fifty-five billion, eight hundred eighty-six million, three hundred forty-one thousand, nine hundred ninety-one".