80804778317 has 12 divisors (see below), whose sum is σ = 82194360768. Its totient is φ = 79438323600.

The previous prime is 80804778251. The next prime is 80804778323. The reversal of 80804778317 is 71387740808.

It is a happy number.

It is not a de Polignac number, because 80804778317 - 2¹⁰ = 80804777293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80804778347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8966828 + ... + 8975834.

It is an arithmetic number, because the mean of its divisors is an integer number (6849530064).

Almost surely, 2^80804778317 is an apocalyptic number.

It is an amenable number.

80804778317 is a deficient number, since it is larger than the sum of its proper divisors (1389582451).

80804778317 is an equidigital number, since it uses as much as digits as its factorization.

80804778317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11540 (or 11479 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 53.

The spelling of 80804778317 in words is "eighty billion, eight hundred four million, seven hundred seventy-eight thousand, three hundred seventeen".