2188783809 has 8 divisors (see below), whose sum is σ = 3242642720. Its totient is φ = 1459189188.

The previous prime is 2188783789. The next prime is 2188783837. The reversal of 2188783809 is 9083878812.

It is not a de Polignac number, because 2188783809 - 2⁵ = 2188783777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2188783859) 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, 40533007 + ... + 40533060.

It is an arithmetic number, because the mean of its divisors is an integer number (405330340).

Almost surely, 2^2188783809 is an apocalyptic number.

It is an amenable number.

2188783809 is a deficient number, since it is larger than the sum of its proper divisors (1053858911).

2188783809 is an equidigital number, since it uses as much as digits as its factorization.

2188783809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81066076 (or 81066070 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 2188783809 is about 46784.4398171016. The cubic root of 2188783809 is about 1298.3774251578.

The spelling of 2188783809 in words is "two billion, one hundred eighty-eight million, seven hundred eighty-three thousand, eight hundred nine".