43605944009 has 4 divisors (see below), whose sum is σ = 44013476304. Its totient is φ = 43198411716.

The previous prime is 43605943987. The next prime is 43605944017. The reversal of 43605944009 is 90044950634.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43605944009 - 2⁸ = 43605943753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43605944029) 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 in 3 ways as a sum of consecutive naturals, for example, 203765987 + ... + 203766200.

It is an arithmetic number, because the mean of its divisors is an integer number (11003369076).

Almost surely, 2^43605944009 is an apocalyptic number.

It is an amenable number.

43605944009 is a deficient number, since it is larger than the sum of its proper divisors (407532295).

43605944009 is a wasteful number, since it uses less digits than its factorization.

43605944009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407532294.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 43605944009 in words is "forty-three billion, six hundred five million, nine hundred forty-four thousand, nine".