43344128399 has 16 divisors (see below), whose sum is σ = 50941729440. Its totient is φ = 36358440960.

The previous prime is 43344128389. The next prime is 43344128411. The reversal of 43344128399 is 99382144334.

43344128399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 43344128399 - 2¹⁶ = 43344062863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43344128339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314999 + ... + 431175.

It is an arithmetic number, because the mean of its divisors is an integer number (3183858090).

Almost surely, 2^43344128399 is an apocalyptic number.

43344128399 is a deficient number, since it is larger than the sum of its proper divisors (7597601041).

43344128399 is a wasteful number, since it uses less digits than its factorization.

43344128399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118810.

The product of its digits is 2239488, while the sum is 50.

The spelling of 43344128399 in words is "forty-three billion, three hundred forty-four million, one hundred twenty-eight thousand, three hundred ninety-nine".