255491817127 has 4 divisors (see below), whose sum is σ = 255560262280. Its totient is φ = 255423371976.

The previous prime is 255491817121. The next prime is 255491817179. The reversal of 255491817127 is 721718194552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 255491817127 - 2⁷ = 255491816999 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 (255491817121) 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, 34216977 + ... + 34224442.

It is an arithmetic number, because the mean of its divisors is an integer number (63890065570).

Almost surely, 2^255491817127 is an apocalyptic number.

255491817127 is a deficient number, since it is larger than the sum of its proper divisors (68445153).

255491817127 is an equidigital number, since it uses as much as digits as its factorization.

255491817127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68445152.

The product of its digits is 1411200, while the sum is 52.

The spelling of 255491817127 in words is "two hundred fifty-five billion, four hundred ninety-one million, eight hundred seventeen thousand, one hundred twenty-seven".