255256668 has 72 divisors (see below), whose sum is σ = 678132000. Its totient is φ = 80800896.

The previous prime is 255256657. The next prime is 255256721. The reversal of 255256668 is 866652552.

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, 122338 + ... + 124406.

It is an arithmetic number, because the mean of its divisors is an integer number (9418500).

Almost surely, 2^255256668 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 255256668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339066000).

255256668 is an abundant number, since it is smaller than the sum of its proper divisors (422875332).

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

255256668 is a wasteful number, since it uses less digits than its factorization.

255256668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2246 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 255256668 is about 15976.7539882168. The cubic root of 255256668 is about 634.3452593756.

The spelling of 255256668 in words is "two hundred fifty-five million, two hundred fifty-six thousand, six hundred sixty-eight".