255533516568 has 192 divisors, whose sum is σ = 771001545600. Its totient is φ = 75802752000.

The previous prime is 255533516551. The next prime is 255533516587. The reversal of 255533516568 is 865615335552.

255533516568 is a `hidden beast` number, since 2 + 5 + 5 + 533 + 51 + 6 + 56 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11250103 + ... + 11272793.

It is an arithmetic number, because the mean of its divisors is an integer number (4015633050).

Almost surely, 2^255533516568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255533516568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385500772800).

255533516568 is an abundant number, since it is smaller than the sum of its proper divisors (515468029032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255533516568 is a wasteful number, since it uses less digits than its factorization.

255533516568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23014 (or 23007 counting only the distinct ones).

The product of its digits is 16200000, while the sum is 54.

The spelling of 255533516568 in words is "two hundred fifty-five billion, five hundred thirty-three million, five hundred sixteen thousand, five hundred sixty-eight".