255031328861 has 16 divisors (see below), whose sum is σ = 272327313600. Its totient is φ = 238139814528.

The previous prime is 255031328803. The next prime is 255031328869. The reversal of 255031328861 is 168823130552.

It is a cyclic number.

It is not a de Polignac number, because 255031328861 - 2²⁶ = 254964219997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255031328869) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 298166 + ... + 773928.

It is an arithmetic number, because the mean of its divisors is an integer number (17020457100).

Almost surely, 2^255031328861 is an apocalyptic number.

It is an amenable number.

255031328861 is a deficient number, since it is larger than the sum of its proper divisors (17295984739).

255031328861 is a wasteful number, since it uses less digits than its factorization.

255031328861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476188.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 255031328861 in words is "two hundred fifty-five billion, thirty-one million, three hundred twenty-eight thousand, eight hundred sixty-one".