44459591081 has 2 divisors, whose sum is σ = 44459591082. Its totient is φ = 44459591080.

The previous prime is 44459591039. The next prime is 44459591089. The reversal of 44459591081 is 18019595444.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40233941056 + 4225650025 = 200584^2 + 65005^2 .

It is a cyclic number.

It is not a de Polignac number, because 44459591081 - 2⁶ = 44459591017 is a prime.

It is a super-2 number, since 2×44459591081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (44459591089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22229795540 + 22229795541.

It is an arithmetic number, because the mean of its divisors is an integer number (22229795541).

Almost surely, 2^44459591081 is an apocalyptic number.

It is an amenable number.

44459591081 is a deficient number, since it is larger than the sum of its proper divisors (1).

44459591081 is an equidigital number, since it uses as much as digits as its factorization.

44459591081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 44459591081 in words is "forty-four billion, four hundred fifty-nine million, five hundred ninety-one thousand, eighty-one".