80716081 has 4 divisors (see below), whose sum is σ = 80932852. Its totient is φ = 80499312.

The previous prime is 80716079. The next prime is 80716169. The reversal of 80716081 is 18061708.

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 53582400 + 27133681 = 7320^2 + 5209^2 .

It is a cyclic number.

It is not a de Polignac number, because 80716081 - 2¹ = 80716079 is a prime.

It is a super-2 number, since 2×80716081² = 13030171463997122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80716001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107826 + ... + 108571.

It is an arithmetic number, because the mean of its divisors is an integer number (20233213).

Almost surely, 2^80716081 is an apocalyptic number.

It is an amenable number.

80716081 is a deficient number, since it is larger than the sum of its proper divisors (216771).

80716081 is a wasteful number, since it uses less digits than its factorization.

80716081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216770.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 80716081 is about 8984.2128759285. The cubic root of 80716081 is about 432.1687458765.

Adding to 80716081 its reverse (18061708), we get a palindrome (98777789).

The spelling of 80716081 in words is "eighty million, seven hundred sixteen thousand, eighty-one".