4021444378807 has 2 divisors, whose sum is σ = 4021444378808. Its totient is φ = 4021444378806.

The previous prime is 4021444378801. The next prime is 4021444378937. The reversal of 4021444378807 is 7088734441204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021444378807 is a prime.

It is a super-2 number, since 2×4021444378807² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021444378801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722189403 + 2010722189404.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722189404).

Almost surely, 2^{4021444378807} is an apocalyptic number.

4021444378807 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444378807 is an equidigital number, since it uses as much as digits as its factorization.

4021444378807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4816896, while the sum is 52.

The spelling of 4021444378807 in words is "four trillion, twenty-one billion, four hundred forty-four million, three hundred seventy-eight thousand, eight hundred seven".