255807245017 has 4 divisors (see below), whose sum is σ = 270854730036. Its totient is φ = 240759760000.

The previous prime is 255807244999. The next prime is 255807245063. The reversal of 255807245017 is 710542708552.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67819097241 + 187988147776 = 260421^2 + 433576^2 .

It is a cyclic number.

It is not a de Polignac number, because 255807245017 - 2¹¹ = 255807242969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255807245077) 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, 7523742484 + ... + 7523742517.

It is an arithmetic number, because the mean of its divisors is an integer number (67713682509).

Almost surely, 2^255807245017 is an apocalyptic number.

It is an amenable number.

255807245017 is a deficient number, since it is larger than the sum of its proper divisors (15047485019).

255807245017 is a wasteful number, since it uses less digits than its factorization.

255807245017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15047485018.

The product of its (nonzero) digits is 784000, while the sum is 46.

The spelling of 255807245017 in words is "two hundred fifty-five billion, eight hundred seven million, two hundred forty-five thousand, seventeen".