255805560 has 256 divisors, whose sum is σ = 898128000. Its totient is φ = 64696320.

The previous prime is 255805553. The next prime is 255805573. The reversal of 255805560 is 65508552.

255805560 is a `hidden beast` number, since 25 + 5 + 80 + 556 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2346786 + ... + 2346894.

Almost surely, 2^255805560 is an apocalyptic number.

255805560 is a gapful number since it is divisible by the number (20) 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 255805560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449064000).

255805560 is an abundant number, since it is smaller than the sum of its proper divisors (642322440).

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

255805560 is a wasteful number, since it uses less digits than its factorization.

255805560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 255805560 is about 15993.9225957862. The cubic root of 255805560 is about 634.7996226426.

It can be divided in two parts, 255 and 805560, that added together give a triangular number (805815 = T₁₂₆₉).

The spelling of 255805560 in words is "two hundred fifty-five million, eight hundred five thousand, five hundred sixty".