2168418909 has 16 divisors (see below), whose sum is σ = 3175718400. Its totient is φ = 1309982256.

The previous prime is 2168418899. The next prime is 2168418913. The reversal of 2168418909 is 9098148612.

It is not a de Polignac number, because 2168418909 - 2⁴ = 2168418893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168418919) 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 15 ways as a sum of consecutive naturals, for example, 825699 + ... + 828320.

It is an arithmetic number, because the mean of its divisors is an integer number (198482400).

Almost surely, 2^2168418909 is an apocalyptic number.

It is an amenable number.

2168418909 is a deficient number, since it is larger than the sum of its proper divisors (1007299491).

2168418909 is a wasteful number, since it uses less digits than its factorization.

2168418909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654064.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 2168418909 is about 46566.2851105819. The cubic root of 2168418909 is about 1294.3380802562.

The spelling of 2168418909 in words is "two billion, one hundred sixty-eight million, four hundred eighteen thousand, nine hundred nine".