2005535043209 has 4 divisors (see below), whose sum is σ = 2005799738004. Its totient is φ = 2005270348416.

The previous prime is 2005535043089. The next prime is 2005535043247. The reversal of 2005535043209 is 9023405355002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 956098706809 + 1049436336400 = 977803^2 + 1024420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005535043209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005535042209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132336032 + ... + 132351185.

It is an arithmetic number, because the mean of its divisors is an integer number (501449934501).

Almost surely, 2^{2005535043209} is an apocalyptic number.

It is an amenable number.

2005535043209 is a deficient number, since it is larger than the sum of its proper divisors (264694795).

2005535043209 is an equidigital number, since it uses as much as digits as its factorization.

2005535043209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264694794.

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 2005535043209 in words is "two trillion, five billion, five hundred thirty-five million, forty-three thousand, two hundred nine".