2218046409 has 24 divisors (see below), whose sum is σ = 3324965280. Its totient is φ = 1477603296.

The previous prime is 2218046407. The next prime is 2218046417. The reversal of 2218046409 is 9046408122.

2218046409 is a `hidden beast` number, since 2 + 2 + 1 + 8 + 0 + 4 + 640 + 9 = 666.

It is not a de Polignac number, because 2218046409 - 2¹ = 2218046407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2218046401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 451237 + ... + 456125.

It is an arithmetic number, because the mean of its divisors is an integer number (138540220).

Almost surely, 2^2218046409 is an apocalyptic number.

It is an amenable number.

2218046409 is a deficient number, since it is larger than the sum of its proper divisors (1106918871).

2218046409 is an equidigital number, since it uses as much as digits as its factorization.

2218046409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771 (or 6759 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2218046409 is about 47096.1400647654. The cubic root of 2218046409 is about 1304.1379800627.

The spelling of 2218046409 in words is "two billion, two hundred eighteen million, forty-six thousand, four hundred nine".