80105890393 has 2 divisors, whose sum is σ = 80105890394. Its totient is φ = 80105890392.

The previous prime is 80105890363. The next prime is 80105890421. The reversal of 80105890393 is 39309850108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79387007049 + 718883344 = 281757^2 + 26812^2 .

It is a cyclic number.

It is not a de Polignac number, because 80105890393 - 2⁹ = 80105889881 is a prime.

It is not a weakly prime, because it can be changed into another prime (80105890303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40052945196 + 40052945197.

It is an arithmetic number, because the mean of its divisors is an integer number (40052945197).

Almost surely, 2^80105890393 is an apocalyptic number.

It is an amenable number.

80105890393 is a deficient number, since it is larger than the sum of its proper divisors (1).

80105890393 is an equidigital number, since it uses as much as digits as its factorization.

80105890393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 80105890393 in words is "eighty billion, one hundred five million, eight hundred ninety thousand, three hundred ninety-three".