255776520 has 128 divisors (see below), whose sum is σ = 806371200. Its totient is φ = 64813056.

The previous prime is 255776497. The next prime is 255776527. The reversal of 255776520 is 25677552.

It is not an unprimeable number, because it can be changed into a prime (255776527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232612 + ... + 233708.

It is an arithmetic number, because the mean of its divisors is an integer number (6299775).

Almost surely, 2^255776520 is an apocalyptic number.

255776520 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 255776520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403185600).

255776520 is an abundant number, since it is smaller than the sum of its proper divisors (550594680).

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

255776520 is a wasteful number, since it uses less digits than its factorization.

255776520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 39.

The square root of 255776520 is about 15993.0147251855. The cubic root of 255776520 is about 634.7756001277.

The spelling of 255776520 in words is "two hundred fifty-five million, seven hundred seventy-six thousand, five hundred twenty".