255664128 has 112 divisors (see below), whose sum is σ = 695163456. Its totient is φ = 83558400.

The previous prime is 255664091. The next prime is 255664267. The reversal of 255664128 is 821466552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2482125 + ... + 2482227.

Almost surely, 2^255664128 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 255664128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347581728).

255664128 is an abundant number, since it is smaller than the sum of its proper divisors (439499328).

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

255664128 is a wasteful number, since it uses less digits than its factorization.

255664128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 209 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 255664128 is about 15989.5005550517. The cubic root of 255664128 is about 634.6826098985.

The spelling of 255664128 in words is "two hundred fifty-five million, six hundred sixty-four thousand, one hundred twenty-eight".