8816379643 has 4 divisors (see below), whose sum is σ = 8845097800. Its totient is φ = 8787661488.

The previous prime is 8816379629. The next prime is 8816379739. The reversal of 8816379643 is 3469736188.

It is a happy number.

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 8816379643 - 2²⁵ = 8782825211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8816379623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14358618 + ... + 14359231.

It is an arithmetic number, because the mean of its divisors is an integer number (2211274450).

Almost surely, 2^8816379643 is an apocalyptic number.

8816379643 is a deficient number, since it is larger than the sum of its proper divisors (28718157).

8816379643 is a wasteful number, since it uses less digits than its factorization.

8816379643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28718156.

The product of its digits is 5225472, while the sum is 55.

The square root of 8816379643 is about 93895.5783996243. The cubic root of 8816379643 is about 2065.8403748483.

The spelling of 8816379643 in words is "eight billion, eight hundred sixteen million, three hundred seventy-nine thousand, six hundred forty-three".