255605644 has 48 divisors (see below), whose sum is σ = 533687616. Its totient is φ = 104832000.

The previous prime is 255605639. The next prime is 255605653. The reversal of 255605644 is 446506552.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58744 + ... + 62944.

It is an arithmetic number, because the mean of its divisors is an integer number (11118492).

Almost surely, 2^255605644 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 255605644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266843808).

255605644 is an abundant number, since it is smaller than the sum of its proper divisors (278081972).

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

255605644 is a wasteful number, since it uses less digits than its factorization.

255605644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306 (or 4304 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 255605644 is about 15987.6716253493. The cubic root of 255605644 is about 634.6342109714.

The spelling of 255605644 in words is "two hundred fifty-five million, six hundred five thousand, six hundred forty-four".