2163836808 has 128 divisors (see below), whose sum is σ = 6881952000. Its totient is φ = 617103360.

The previous prime is 2163836791. The next prime is 2163836813. The reversal of 2163836808 is 8086383612.

2163836808 is a `hidden beast` number, since 2 + 1 + 638 + 3 + 6 + 8 + 0 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1161798 + ... + 1163658.

It is an arithmetic number, because the mean of its divisors is an integer number (53765250).

Almost surely, 2^2163836808 is an apocalyptic number.

2163836808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163836808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3440976000).

2163836808 is an abundant number, since it is smaller than the sum of its proper divisors (4718115192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2163836808 is a wasteful number, since it uses less digits than its factorization.

2163836808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 2163836808 is about 46517.0593223604. The cubic root of 2163836808 is about 1293.4257457497.

The spelling of 2163836808 in words is "two billion, one hundred sixty-three million, eight hundred thirty-six thousand, eight hundred eight".