80394390017 has 4 divisors (see below), whose sum is σ = 81297697860. Its totient is φ = 79491082176.

The previous prime is 80394389993. The next prime is 80394390101. The reversal of 80394390017 is 71009349308.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55735655056 + 24658734961 = 236084^2 + 157031^2 .

It is a cyclic number.

It is not a de Polignac number, because 80394390017 - 2⁶ = 80394389953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80394390017.

It is not an unprimeable number, because it can be changed into a prime (80394390917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451653788 + ... + 451653965.

It is an arithmetic number, because the mean of its divisors is an integer number (20324424465).

Almost surely, 2^80394390017 is an apocalyptic number.

It is an amenable number.

80394390017 is a deficient number, since it is larger than the sum of its proper divisors (903307843).

80394390017 is an equidigital number, since it uses as much as digits as its factorization.

80394390017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903307842.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 80394390017 in words is "eighty billion, three hundred ninety-four million, three hundred ninety thousand, seventeen".