2163836809 has 8 divisors (see below), whose sum is σ = 2192863680. Its totient is φ = 2134880496.

The previous prime is 2163836791. The next prime is 2163836813. The reversal of 2163836809 is 9086383612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2163836809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163836839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45612 + ... + 80050.

It is an arithmetic number, because the mean of its divisors is an integer number (274107960).

Almost surely, 2^2163836809 is an apocalyptic number.

It is an amenable number.

2163836809 is a deficient number, since it is larger than the sum of its proper divisors (29026871).

2163836809 is an equidigital number, since it uses as much as digits as its factorization.

2163836809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35279.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 2163836809 is about 46517.0593331092. The cubic root of 2163836809 is about 1293.4257459489.

The spelling of 2163836809 in words is "two billion, one hundred sixty-three million, eight hundred thirty-six thousand, eight hundred nine".