255355433998813 has 2 divisors, whose sum is σ = 255355433998814. Its totient is φ = 255355433998812.

The previous prime is 255355433998807. The next prime is 255355433998901. The reversal of 255355433998813 is 318899334553552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254255207125924 + 1100226872889 = 15945382^2 + 1048917^2 .

It is a cyclic number.

It is not a de Polignac number, because 255355433998813 - 2⁵ = 255355433998781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255355433998213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127677716999406 + 127677716999407.

It is an arithmetic number, because the mean of its divisors is an integer number (127677716999407).

Almost surely, 2^{255355433998813} is an apocalyptic number.

It is an amenable number.

255355433998813 is a deficient number, since it is larger than the sum of its proper divisors (1).

255355433998813 is an equidigital number, since it uses as much as digits as its factorization.

255355433998813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520000, while the sum is 73.

The spelling of 255355433998813 in words is "two hundred fifty-five trillion, three hundred fifty-five billion, four hundred thirty-three million, nine hundred ninety-eight thousand, eight hundred thirteen".