255666313728 has 180 divisors, whose sum is σ = 858339669330. Its totient is φ = 73047453696.

The previous prime is 255666313697. The next prime is 255666313751. The reversal of 255666313728 is 827313666552.

It can be written as a sum of positive squares in only one way, i.e., 172749959424 + 82916354304 = 415632^2 + 287952^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 340363 + ... + 791946.

Almost surely, 2^255666313728 is an apocalyptic number.

255666313728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

255666313728 is an abundant number, since it is smaller than the sum of its proper divisors (602673355602).

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

255666313728 is a wasteful number, since it uses less digits than its factorization.

255666313728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132347 (or 1132321 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 255666313728 in words is "two hundred fifty-five billion, six hundred sixty-six million, three hundred thirteen thousand, seven hundred twenty-eight".