40044844109 has 2 divisors, whose sum is σ = 40044844110. Its totient is φ = 40044844108.

The previous prime is 40044844079. The next prime is 40044844159. The reversal of 40044844109 is 90144844004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27382968484 + 12661875625 = 165478^2 + 112525^2 .

It is a cyclic number.

It is not a de Polignac number, because 40044844109 - 2²⁴ = 40028066893 is a prime.

It is a super-2 number, since 2×40044844109² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40044844159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20022422054 + 20022422055.

It is an arithmetic number, because the mean of its divisors is an integer number (20022422055).

Almost surely, 2^40044844109 is an apocalyptic number.

It is an amenable number.

40044844109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40044844109 is an equidigital number, since it uses as much as digits as its factorization.

40044844109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 40044844109 in words is "forty billion, forty-four million, eight hundred forty-four thousand, one hundred nine".