255726199091 has 8 divisors (see below), whose sum is σ = 279130520064. Its totient is φ = 232347958920.

The previous prime is 255726199061. The next prime is 255726199139. The reversal of 255726199091 is 190991627552.

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

It is a de Polignac number, because none of the positive numbers 2^k-255726199091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255726199051) 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, 6499691 + ... + 6538916.

It is an arithmetic number, because the mean of its divisors is an integer number (34891315008).

Almost surely, 2^255726199091 is an apocalyptic number.

255726199091 is a deficient number, since it is larger than the sum of its proper divisors (23404320973).

255726199091 is a wasteful number, since it uses less digits than its factorization.

255726199091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13040401.

The product of its (nonzero) digits is 3061800, while the sum is 56.

The spelling of 255726199091 in words is "two hundred fifty-five billion, seven hundred twenty-six million, one hundred ninety-nine thousand, ninety-one".