255655805904 has 160 divisors (see below), whose sum is σ = 750791232000. Its totient is φ = 83255095296.

The previous prime is 255655805897. The next prime is 255655805953. The reversal of 255655805904 is 409508556552.

It is a happy number.

255655805904 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 5 + 580 + 59 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11541912 + ... + 11564040.

It is an arithmetic number, because the mean of its divisors is an integer number (4692445200).

Almost surely, 2^255655805904 is an apocalyptic number.

255655805904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255655805904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375395616000).

255655805904 is an abundant number, since it is smaller than the sum of its proper divisors (495135426096).

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

255655805904 is a wasteful number, since it uses less digits than its factorization.

255655805904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22762 (or 22750 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 54.

The spelling of 255655805904 in words is "two hundred fifty-five billion, six hundred fifty-five million, eight hundred five thousand, nine hundred four".