255617500647 has 8 divisors (see below), whose sum is σ = 340833052144. Its totient is φ = 170406808128.

The previous prime is 255617500601. The next prime is 255617500651. The reversal of 255617500647 is 746005716552.

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

It is not a de Polignac number, because 255617500647 - 2²⁰ = 255616452071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255617500596 and 255617500605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255617500687) 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, 1090168 + ... + 1303725.

It is an arithmetic number, because the mean of its divisors is an integer number (42604131518).

Almost surely, 2^255617500647 is an apocalyptic number.

255617500647 is a deficient number, since it is larger than the sum of its proper divisors (85215551497).

255617500647 is a wasteful number, since it uses less digits than its factorization.

255617500647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429489.

The product of its (nonzero) digits is 1764000, while the sum is 48.

The spelling of 255617500647 in words is "two hundred fifty-five billion, six hundred seventeen million, five hundred thousand, six hundred forty-seven".