255602556 has 72 divisors (see below), whose sum is σ = 714849408. Its totient is φ = 76356000.

The previous prime is 255602551. The next prime is 255602561. The reversal of 255602556 is 655206552.

255602556 is a `hidden beast` number, since 25 + 560 + 25 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (255602551) and next prime (255602561).

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

It is a self number, because there is not a number n which added to its sum of digits gives 255602556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255602551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23571 + ... + 32661.

It is an arithmetic number, because the mean of its divisors is an integer number (9928464).

Almost surely, 2^255602556 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 255602556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357424704).

255602556 is an abundant number, since it is smaller than the sum of its proper divisors (459246852).

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

255602556 is a wasteful number, since it uses less digits than its factorization.

255602556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9183 (or 9178 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 255602556 is about 15987.5750506448. The cubic root of 255602556 is about 634.6316552658.

The spelling of 255602556 in words is "two hundred fifty-five million, six hundred two thousand, five hundred fifty-six".