40440244222409 has 2 divisors, whose sum is σ = 40440244222410. Its totient is φ = 40440244222408.

The previous prime is 40440244222373. The next prime is 40440244222447. The reversal of 40440244222409 is 90422244204404.

It is a happy number.

40440244222409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31918206144400 + 8522038078009 = 5649620^2 + 2919253^2 .

It is a cyclic number.

It is not a de Polignac number, because 40440244222409 - 2²⁴ = 40440227445193 is a prime.

It is not a weakly prime, because it can be changed into another prime (40440244282409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220122111204 + 20220122111205.

It is an arithmetic number, because the mean of its divisors is an integer number (20220122111205).

Almost surely, 2^{40440244222409} is an apocalyptic number.

It is an amenable number.

40440244222409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40440244222409 is an equidigital number, since it uses as much as digits as its factorization.

40440244222409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 589824, while the sum is 41.

The spelling of 40440244222409 in words is "forty trillion, four hundred forty billion, two hundred forty-four million, two hundred twenty-two thousand, four hundred nine".