255660344517 has 16 divisors (see below), whose sum is σ = 350515879040. Its totient is φ = 165633636672.

The previous prime is 255660344509. The next prime is 255660344531. The reversal of 255660344517 is 715443066552.

It is not a de Polignac number, because 255660344517 - 2³ = 255660344509 is a prime.

It is a super-2 number, since 2×255660344517² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255660344507) 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, 1297153 + ... + 1481190.

It is an arithmetic number, because the mean of its divisors is an integer number (21907242440).

Almost surely, 2^255660344517 is an apocalyptic number.

It is an amenable number.

255660344517 is a deficient number, since it is larger than the sum of its proper divisors (94855534523).

255660344517 is a wasteful number, since it uses less digits than its factorization.

255660344517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779212.

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 255660344517 in words is "two hundred fifty-five billion, six hundred sixty million, three hundred forty-four thousand, five hundred seventeen".