44004422020991 has 2 divisors, whose sum is σ = 44004422020992. Its totient is φ = 44004422020990.

The previous prime is 44004422020891. The next prime is 44004422021033. The reversal of 44004422020991 is 19902022440044.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44004422020991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44004422020891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22002211010495 + 22002211010496.

It is an arithmetic number, because the mean of its divisors is an integer number (22002211010496).

Almost surely, 2^{44004422020991} is an apocalyptic number.

44004422020991 is a deficient number, since it is larger than the sum of its proper divisors (1).

44004422020991 is an equidigital number, since it uses as much as digits as its factorization.

44004422020991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 44004422020991 in words is "forty-four trillion, four billion, four hundred twenty-two million, twenty thousand, nine hundred ninety-one".