43644394403 has 2 divisors, whose sum is σ = 43644394404. Its totient is φ = 43644394402.

The previous prime is 43644394373. The next prime is 43644394447. The reversal of 43644394403 is 30449344634.

It is an a-pointer prime, because the next prime (43644394447) can be obtained adding 43644394403 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43644394403 - 2⁸ = 43644394147 is a prime.

It is not a weakly prime, because it can be changed into another prime (43644394463) 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, 21822197201 + 21822197202.

It is an arithmetic number, because the mean of its divisors is an integer number (21822197202).

Almost surely, 2^43644394403 is an apocalyptic number.

43644394403 is a deficient number, since it is larger than the sum of its proper divisors (1).

43644394403 is an equidigital number, since it uses as much as digits as its factorization.

43644394403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 44.

The spelling of 43644394403 in words is "forty-three billion, six hundred forty-four million, three hundred ninety-four thousand, four hundred three".