255811944093 has 4 divisors (see below), whose sum is σ = 341082592128. Its totient is φ = 170541296060.

The previous prime is 255811944083. The next prime is 255811944103. The reversal of 255811944093 is 390449118552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (255811944083) and next prime (255811944103).

It is a cyclic number.

It is not a de Polignac number, because 255811944093 - 2⁸ = 255811943837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255811944053) 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, 42635324013 + ... + 42635324018.

It is an arithmetic number, because the mean of its divisors is an integer number (85270648032).

Almost surely, 2^255811944093 is an apocalyptic number.

It is an amenable number.

255811944093 is a deficient number, since it is larger than the sum of its proper divisors (85270648035).

255811944093 is an equidigital number, since it uses as much as digits as its factorization.

255811944093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85270648034.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 255811944093 in words is "two hundred fifty-five billion, eight hundred eleven million, nine hundred forty-four thousand, ninety-three".