8120869885 has 8 divisors (see below), whose sum is σ = 9791230176. Its totient is φ = 6465905040.

The previous prime is 8120869873. The next prime is 8120869903. The reversal of 8120869885 is 5889680218.

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

It is a de Polignac number, because none of the positive numbers 2^k-8120869885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3847699 + ... + 3849808.

It is an arithmetic number, because the mean of its divisors is an integer number (1223903772).

Almost surely, 2^8120869885 is an apocalyptic number.

It is an amenable number.

8120869885 is a deficient number, since it is larger than the sum of its proper divisors (1670360291).

8120869885 is a wasteful number, since it uses less digits than its factorization.

8120869885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7697723.

The product of its (nonzero) digits is 2211840, while the sum is 55.

The square root of 8120869885 is about 90115.8692184678. The cubic root of 8120869885 is about 2010.0221844370.

The spelling of 8120869885 in words is "eight billion, one hundred twenty million, eight hundred sixty-nine thousand, eight hundred eighty-five".