255641580 has 144 divisors (see below), whose sum is σ = 864470880. Its totient is φ = 60770304.

The previous prime is 255641549. The next prime is 255641587. The reversal of 255641580 is 85146552.

255641580 is a `hidden beast` number, since 2 + 5 + 5 + 641 + 5 + 8 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (255641587) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55942 + ... + 60338.

It is an arithmetic number, because the mean of its divisors is an integer number (6003270).

Almost surely, 2^255641580 is an apocalyptic number.

255641580 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 255641580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432235440).

255641580 is an abundant number, since it is smaller than the sum of its proper divisors (608829300).

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

255641580 is a wasteful number, since it uses less digits than its factorization.

255641580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448 (or 4443 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 255641580 is about 15988.7954518156. The cubic root of 255641580 is about 634.6639509854.

The spelling of 255641580 in words is "two hundred fifty-five million, six hundred forty-one thousand, five hundred eighty".