80685371321 has 8 divisors (see below), whose sum is σ = 85673591784. Its totient is φ = 75724042240.

The previous prime is 80685371317. The next prime is 80685371339. The reversal of 80685371321 is 12317358608.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18154867600 + 62530503721 = 134740^2 + 250061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80685371321 - 2² = 80685371317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80685371021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6716660 + ... + 6728661.

It is an arithmetic number, because the mean of its divisors is an integer number (10709198973).

Almost surely, 2^80685371321 is an apocalyptic number.

It is an amenable number.

80685371321 is a deficient number, since it is larger than the sum of its proper divisors (4988220463).

80685371321 is a wasteful number, since it uses less digits than its factorization.

80685371321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445691.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 80685371321 in words is "eighty billion, six hundred eighty-five million, three hundred seventy-one thousand, three hundred twenty-one".