80871611 has 4 divisors (see below), whose sum is σ = 84387792. Its totient is φ = 77355432.

The previous prime is 80871559. The next prime is 80871617. The reversal of 80871611 is 11617808.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80871611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80871617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758056 + ... + 1758101.

It is an arithmetic number, because the mean of its divisors is an integer number (21096948).

Almost surely, 2^80871611 is an apocalyptic number.

80871611 is a deficient number, since it is larger than the sum of its proper divisors (3516181).

80871611 is a wasteful number, since it uses less digits than its factorization.

80871611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516180.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 80871611 is about 8992.8644491063. The cubic root of 80871611 is about 432.4461465239.

The spelling of 80871611 in words is "eighty million, eight hundred seventy-one thousand, six hundred eleven".