2644244089 has 4 divisors (see below), whose sum is σ = 2645288080. Its totient is φ = 2643200100.

The previous prime is 2644244081. The next prime is 2644244093. The reversal of 2644244089 is 9804424462.

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 2644244089 - 2³ = 2644244081 is a prime.

It is a super-2 number, since 2×2644244089² = 13984053604422879842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2644244081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518187 + ... + 523264.

It is an arithmetic number, because the mean of its divisors is an integer number (661322020).

Almost surely, 2^2644244089 is an apocalyptic number.

It is an amenable number.

2644244089 is a deficient number, since it is larger than the sum of its proper divisors (1043991).

2644244089 is a wasteful number, since it uses less digits than its factorization.

2644244089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043990.

The product of its (nonzero) digits is 442368, while the sum is 43.

The square root of 2644244089 is about 51422.2139643948. The cubic root of 2644244089 is about 1382.8248669367.

The spelling of 2644244089 in words is "two billion, six hundred forty-four million, two hundred forty-four thousand, eighty-nine".