2163809999 has 8 divisors (see below), whose sum is σ = 2330637792. Its totient is φ = 1997036640.

The previous prime is 2163809941. The next prime is 2163810023. The reversal of 2163809999 is 9999083612.

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-2163809999 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 (2163809299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111854 + ... + 129764.

It is an arithmetic number, because the mean of its divisors is an integer number (291329724).

Almost surely, 2^2163809999 is an apocalyptic number.

2163809999 is a deficient number, since it is larger than the sum of its proper divisors (166827793).

2163809999 is a wasteful number, since it uses less digits than its factorization.

2163809999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27217.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The square root of 2163809999 is about 46516.7711583682. The cubic root of 2163809999 is about 1293.4204040662.

The spelling of 2163809999 in words is "two billion, one hundred sixty-three million, eight hundred nine thousand, nine hundred ninety-nine".