255663344017 has 4 divisors (see below), whose sum is σ = 255664934896. Its totient is φ = 255661753140.

The previous prime is 255663344011. The next prime is 255663344023. The reversal of 255663344017 is 710443366552.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (255663344011) and next prime (255663344023).

It is a cyclic number.

It is not a de Polignac number, because 255663344017 - 2²⁷ = 255529126289 is a prime.

It is a super-3 number, since 3×255663344017³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255663344011) 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, 523359 + ... + 886132.

It is an arithmetic number, because the mean of its divisors is an integer number (63916233724).

Almost surely, 2^255663344017 is an apocalyptic number.

It is an amenable number.

255663344017 is a deficient number, since it is larger than the sum of its proper divisors (1590879).

255663344017 is a wasteful number, since it uses less digits than its factorization.

255663344017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590878.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 255663344017 in words is "two hundred fifty-five billion, six hundred sixty-three million, three hundred forty-four thousand, seventeen".