80791991113 has 2 divisors, whose sum is σ = 80791991114. Its totient is φ = 80791991112.

The previous prime is 80791991101. The next prime is 80791991143. The reversal of 80791991113 is 31119919708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54106481664 + 26685509449 = 232608^2 + 163357^2 .

It is a cyclic number.

It is not a de Polignac number, because 80791991113 - 2²⁹ = 80255120201 is a prime.

It is not a weakly prime, because it can be changed into another prime (80791991143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40395995556 + 40395995557.

It is an arithmetic number, because the mean of its divisors is an integer number (40395995557).

Almost surely, 2^80791991113 is an apocalyptic number.

It is an amenable number.

80791991113 is a deficient number, since it is larger than the sum of its proper divisors (1).

80791991113 is an equidigital number, since it uses as much as digits as its factorization.

80791991113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 49.

The spelling of 80791991113 in words is "eighty billion, seven hundred ninety-one million, nine hundred ninety-one thousand, one hundred thirteen".