80000856017 has 2 divisors, whose sum is σ = 80000856018. Its totient is φ = 80000856016.

The previous prime is 80000856007. The next prime is 80000856029. The reversal of 80000856017 is 71065800008.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42379986496 + 37620869521 = 205864^2 + 193961^2 .

It is a cyclic number.

It is not a de Polignac number, because 80000856017 - 2¹⁰ = 80000854993 is a prime.

It is not a weakly prime, because it can be changed into another prime (80000856007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40000428008 + 40000428009.

It is an arithmetic number, because the mean of its divisors is an integer number (40000428009).

Almost surely, 2^80000856017 is an apocalyptic number.

It is an amenable number.

80000856017 is a deficient number, since it is larger than the sum of its proper divisors (1).

80000856017 is an equidigital number, since it uses as much as digits as its factorization.

80000856017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 80000856017 in words is "eighty billion, eight hundred fifty-six thousand, seventeen".