80809907398993 has 2 divisors, whose sum is σ = 80809907398994. Its totient is φ = 80809907398992.

The previous prime is 80809907398991. The next prime is 80809907399069. The reversal of 80809907398993 is 39989370990808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79478152162704 + 1331755236289 = 8915052^2 + 1154017^2 .

It is a cyclic number.

It is not a de Polignac number, because 80809907398993 - 2¹ = 80809907398991 is a prime.

It is a super-2 number, since 2×80809907398993² (a number of 29 digits) contains 22 as substring.

Together with 80809907398991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80809907398991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40404953699496 + 40404953699497.

It is an arithmetic number, because the mean of its divisors is an integer number (40404953699497).

Almost surely, 2^{80809907398993} is an apocalyptic number.

It is an amenable number.

80809907398993 is a deficient number, since it is larger than the sum of its proper divisors (1).

80809907398993 is an equidigital number, since it uses as much as digits as its factorization.

80809907398993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1904684544, while the sum is 82.

The spelling of 80809907398993 in words is "eighty trillion, eight hundred nine billion, nine hundred seven million, three hundred ninety-eight thousand, nine hundred ninety-three".