255616520613 has 8 divisors (see below), whose sum is σ = 341680522848. Its totient is φ = 169981766064.

The previous prime is 255616520611. The next prime is 255616520633. The reversal of 255616520613 is 316025616552.

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

It is not a de Polignac number, because 255616520613 - 2¹ = 255616520611 is a prime.

It is a super-2 number, since 2×255616520613² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255616520611) 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, 107310531 + ... + 107312912.

It is an arithmetic number, because the mean of its divisors is an integer number (42710065356).

Almost surely, 2^255616520613 is an apocalyptic number.

It is an amenable number.

255616520613 is a deficient number, since it is larger than the sum of its proper divisors (86064002235).

255616520613 is a wasteful number, since it uses less digits than its factorization.

255616520613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214623843.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 255616520613 in words is "two hundred fifty-five billion, six hundred sixteen million, five hundred twenty thousand, six hundred thirteen".