255489385824 has 72 divisors (see below), whose sum is σ = 726641533800. Its totient is φ = 85152158208.

The previous prime is 255489385747. The next prime is 255489385829. The reversal of 255489385824 is 428583984552.

It is a happy number.

255489385824 is a `hidden beast` number, since 2 + 5 + 5 + 48 + 9 + 3 + 8 + 582 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255489385829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2359627 + ... + 2465525.

It is an arithmetic number, because the mean of its divisors is an integer number (10092243525).

Almost surely, 2^255489385824 is an apocalyptic number.

255489385824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

255489385824 is an abundant number, since it is smaller than the sum of its proper divisors (471152147976).

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

255489385824 is a wasteful number, since it uses less digits than its factorization.

255489385824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114292 (or 114281 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 63.

The spelling of 255489385824 in words is "two hundred fifty-five billion, four hundred eighty-nine million, three hundred eighty-five thousand, eight hundred twenty-four".