2004444638689 has 4 divisors (see below), whose sum is σ = 2005385253040. Its totient is φ = 2003504024340.

The previous prime is 2004444638687. The next prime is 2004444638719. The reversal of 2004444638689 is 9868364444002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2004444638689 - 2¹ = 2004444638687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2004444638681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470303979 + ... + 470308240.

It is an arithmetic number, because the mean of its divisors is an integer number (501346313260).

Almost surely, 2^{2004444638689} is an apocalyptic number.

It is an amenable number.

2004444638689 is a deficient number, since it is larger than the sum of its proper divisors (940614351).

2004444638689 is an equidigital number, since it uses as much as digits as its factorization.

2004444638689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940614350.

The product of its (nonzero) digits is 31850496, while the sum is 58.

The spelling of 2004444638689 in words is "two trillion, four billion, four hundred forty-four million, six hundred thirty-eight thousand, six hundred eighty-nine".