43644394444 has 24 divisors (see below), whose sum is σ = 87300583328. Its totient is φ = 18702213120.

The previous prime is 43644394403. The next prime is 43644394447. The reversal of 43644394444 is 44449344634.

It is not an unprimeable number, because it can be changed into a prime (43644394447) 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 7 ways as a sum of consecutive naturals, for example, 113602 + ... + 316534.

Almost surely, 2^43644394444 is an apocalyptic number.

It is an amenable number.

43644394444 is an abundant number, since it is smaller than the sum of its proper divisors (43656188884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43644394444 is a wasteful number, since it uses less digits than its factorization.

43644394444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210625 (or 210623 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 49.

The spelling of 43644394444 in words is "forty-three billion, six hundred forty-four million, three hundred ninety-four thousand, four hundred forty-four".