255239377717 has 8 divisors (see below), whose sum is σ = 259210230336. Its totient is φ = 251273269632.

The previous prime is 255239377699. The next prime is 255239377751. The reversal of 255239377717 is 717773932552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255239377717 - 2³⁵ = 220879639349 is a prime.

It is a super-2 number, since 2×255239377717² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255239377787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077628 + ... + 1292965.

It is an arithmetic number, because the mean of its divisors is an integer number (32401278792).

Almost surely, 2^255239377717 is an apocalyptic number.

It is an amenable number.

255239377717 is a deficient number, since it is larger than the sum of its proper divisors (3970852619).

255239377717 is a wasteful number, since it uses less digits than its factorization.

255239377717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372267.

The product of its digits is 19448100, while the sum is 58.

The spelling of 255239377717 in words is "two hundred fifty-five billion, two hundred thirty-nine million, three hundred seventy-seven thousand, seven hundred seventeen".