80814073309 has 2 divisors, whose sum is σ = 80814073310. Its totient is φ = 80814073308.

The previous prime is 80814073297. The next prime is 80814073381. The reversal of 80814073309 is 90337041808.

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., 80049384900 + 764688409 = 282930^2 + 27653^2 .

It is a cyclic number.

It is not a de Polignac number, because 80814073309 - 2³³ = 72224138717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80814073409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40407036654 + 40407036655.

It is an arithmetic number, because the mean of its divisors is an integer number (40407036655).

Almost surely, 2^80814073309 is an apocalyptic number.

It is an amenable number.

80814073309 is a deficient number, since it is larger than the sum of its proper divisors (1).

80814073309 is an equidigital number, since it uses as much as digits as its factorization.

80814073309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 80814073309 in words is "eighty billion, eight hundred fourteen million, seventy-three thousand, three hundred nine".