4021444443437 has 2 divisors, whose sum is σ = 4021444443438. Its totient is φ = 4021444443436.

The previous prime is 4021444443377. The next prime is 4021444443461. The reversal of 4021444443437 is 7343444441204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3765078425161 + 256366018276 = 1940381^2 + 506326^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021444443437 - 2¹⁴ = 4021444427053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021446443437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722221718 + 2010722221719.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722221719).

Almost surely, 2^{4021444443437} is an apocalyptic number.

It is an amenable number.

4021444443437 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444443437 is an equidigital number, since it uses as much as digits as its factorization.

4021444443437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 44.

The spelling of 4021444443437 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred forty-three thousand, four hundred thirty-seven".