255251275557 has 4 divisors (see below), whose sum is σ = 340335034080. Its totient is φ = 170167517036.

The previous prime is 255251275481. The next prime is 255251275561. The reversal of 255251275557 is 755572152552.

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 a cyclic number.

It is not a de Polignac number, because 255251275557 - 2¹¹ = 255251273509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255251275457) 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, 42541879257 + ... + 42541879262.

It is an arithmetic number, because the mean of its divisors is an integer number (85083758520).

Almost surely, 2^255251275557 is an apocalyptic number.

It is an amenable number.

255251275557 is a deficient number, since it is larger than the sum of its proper divisors (85083758523).

255251275557 is an equidigital number, since it uses as much as digits as its factorization.

255251275557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85083758522.

The product of its digits is 6125000, while the sum is 51.

The spelling of 255251275557 in words is "two hundred fifty-five billion, two hundred fifty-one million, two hundred seventy-five thousand, five hundred fifty-seven".