4021444439189 has 2 divisors, whose sum is σ = 4021444439190. Its totient is φ = 4021444439188.

The previous prime is 4021444439179. The next prime is 4021444439191. The reversal of 4021444439189 is 9819344441204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2041992414289 + 1979452024900 = 1428983^2 + 1406930^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021444439189 - 2³⁶ = 3952724962453 is a prime.

Together with 4021444439191, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4021444439189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021444439179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722219594 + 2010722219595.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722219595).

Almost surely, 2^{4021444439189} is an apocalyptic number.

It is an amenable number.

4021444439189 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444439189 is an equidigital number, since it uses as much as digits as its factorization.

4021444439189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 4021444439189 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred thirty-nine thousand, one hundred eighty-nine".