255813333380 has 72 divisors (see below), whose sum is σ = 625219328664. Its totient is φ = 87551073280.

The previous prime is 255813333379. The next prime is 255813333401. The reversal of 255813333380 is 83333318552.

It can be written as a sum of positive squares in 4 ways, for example, as 2862678016 + 252950655364 = 53504^2 + 502942^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 3067919 + ... + 3150198.

It is an arithmetic number, because the mean of its divisors is an integer number (8683601787).

Almost surely, 2^255813333380 is an apocalyptic number.

255813333380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255813333380 is an abundant number, since it is smaller than the sum of its proper divisors (369405995284).

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

255813333380 is a wasteful number, since it uses less digits than its factorization.

255813333380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218165 (or 6218152 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 255813333380 in words is "two hundred fifty-five billion, eight hundred thirteen million, three hundred thirty-three thousand, three hundred eighty".