44431813409 has 2 divisors, whose sum is σ = 44431813410. Its totient is φ = 44431813408.

The previous prime is 44431813403. The next prime is 44431813463. The reversal of 44431813409 is 90431813444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23909818384 + 20521995025 = 154628^2 + 143255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44431813409 is a prime.

It is not a weakly prime, because it can be changed into another prime (44431813403) 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, 22215906704 + 22215906705.

It is an arithmetic number, because the mean of its divisors is an integer number (22215906705).

Almost surely, 2^44431813409 is an apocalyptic number.

It is an amenable number.

44431813409 is a deficient number, since it is larger than the sum of its proper divisors (1).

44431813409 is an equidigital number, since it uses as much as digits as its factorization.

44431813409 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 44431813409 in words is "forty-four billion, four hundred thirty-one million, eight hundred thirteen thousand, four hundred nine".