206243445065 has 16 divisors (see below), whose sum is σ = 283098737280. Its totient is φ = 141298784640.

The previous prime is 206243445053. The next prime is 206243445091. The reversal of 206243445065 is 560544342602.

It is not a de Polignac number, because 206243445065 - 2¹⁰ = 206243444041 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2570171 + ... + 2649200.

It is an arithmetic number, because the mean of its divisors is an integer number (17693671080).

Almost surely, 2^206243445065 is an apocalyptic number.

It is an amenable number.

206243445065 is a deficient number, since it is larger than the sum of its proper divisors (76855292215).

206243445065 is a wasteful number, since it uses less digits than its factorization.

206243445065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220512.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 206243445065 its reverse (560544342602), we get a palindrome (766787787667).

The spelling of 206243445065 in words is "two hundred six billion, two hundred forty-three million, four hundred forty-five thousand, sixty-five".