8085978871 has 4 divisors (see below), whose sum is σ = 8090297872. Its totient is φ = 8081659872.

The previous prime is 8085978839. The next prime is 8085978881. The reversal of 8085978871 is 1788795808.

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

It is a cyclic number.

It is not a de Polignac number, because 8085978871 - 2⁵ = 8085978839 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 (8085978881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156691 + ... + 2160436.

It is an arithmetic number, because the mean of its divisors is an integer number (2022574468).

Almost surely, 2^8085978871 is an apocalyptic number.

8085978871 is a deficient number, since it is larger than the sum of its proper divisors (4319001).

8085978871 is a wasteful number, since it uses less digits than its factorization.

8085978871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319000.

The product of its (nonzero) digits is 9031680, while the sum is 61.

The square root of 8085978871 is about 89922.0711004812. The cubic root of 8085978871 is about 2007.1393901457.

The spelling of 8085978871 in words is "eight billion, eighty-five million, nine hundred seventy-eight thousand, eight hundred seventy-one".