255306139632 has 120 divisors (see below), whose sum is σ = 734122532000. Its totient is φ = 82767121920.

The previous prime is 255306139619. The next prime is 255306139703. The reversal of 255306139632 is 236931603552.

It is a happy number.

255306139632 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 0 + 6 + 1 + 3 + 9 + 632 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14637957 + ... + 14655387.

Almost surely, 2^255306139632 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 255306139632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367061266000).

255306139632 is an abundant number, since it is smaller than the sum of its proper divisors (478816392368).

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

255306139632 is a wasteful number, since it uses less digits than its factorization.

255306139632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20231 (or 20222 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 45.

The spelling of 255306139632 in words is "two hundred fifty-five billion, three hundred six million, one hundred thirty-nine thousand, six hundred thirty-two".