255115774617 has 16 divisors (see below), whose sum is σ = 371104673472. Its totient is φ = 154604294720.

The previous prime is 255115774609. The next prime is 255115774631. The reversal of 255115774617 is 716477511552.

It is a cyclic number.

It is not a de Polignac number, because 255115774617 - 2³ = 255115774609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255115774617.

It is not an unprimeable number, because it can be changed into a prime (255115774657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185743 + ... + 738059.

It is an arithmetic number, because the mean of its divisors is an integer number (23194042092).

Almost surely, 2^255115774617 is an apocalyptic number.

It is an amenable number.

255115774617 is a deficient number, since it is larger than the sum of its proper divisors (115988898855).

255115774617 is a wasteful number, since it uses less digits than its factorization.

255115774617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566328.

The product of its digits is 2058000, while the sum is 51.

The spelling of 255115774617 in words is "two hundred fifty-five billion, one hundred fifteen million, seven hundred seventy-four thousand, six hundred seventeen".