40444044457 has 2 divisors, whose sum is σ = 40444044458. Its totient is φ = 40444044456.

The previous prime is 40444044427. The next prime is 40444044481. The reversal of 40444044457 is 75444044404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39503947536 + 940096921 = 198756^2 + 30661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40444044457 is a prime.

It is not a weakly prime, because it can be changed into another prime (40444044427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222022228 + 20222022229.

It is an arithmetic number, because the mean of its divisors is an integer number (20222022229).

Almost surely, 2^40444044457 is an apocalyptic number.

It is an amenable number.

40444044457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444044457 is an equidigital number, since it uses as much as digits as its factorization.

40444044457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 573440, while the sum is 40.

The spelling of 40444044457 in words is "forty billion, four hundred forty-four million, forty-four thousand, four hundred fifty-seven".