4021444444439 has 2 divisors, whose sum is σ = 4021444444440. Its totient is φ = 4021444444438.

The previous prime is 4021444444373. The next prime is 4021444444463. The reversal of 4021444444439 is 9344444441204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021444444439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021444444393 and 4021444444402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021444444489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722222219 + 2010722222220.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722222220).

Almost surely, 2^{4021444444439} is an apocalyptic number.

4021444444439 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444444439 is an equidigital number, since it uses as much as digits as its factorization.

4021444444439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3538944, while the sum is 47.

The spelling of 4021444444439 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred forty-four thousand, four hundred thirty-nine".