206644115873 has 4 divisors (see below), whose sum is σ = 222539817108. Its totient is φ = 190748414640.

The previous prime is 206644115863. The next prime is 206644115879. The reversal of 206644115873 is 378511446602.

206644115873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 90725656849 + 115918459024 = 301207^2 + 340468^2 .

It is a cyclic number.

It is not a de Polignac number, because 206644115873 - 2⁶ = 206644115809 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 (206644115879) 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, 7947850598 + ... + 7947850623.

It is an arithmetic number, because the mean of its divisors is an integer number (55634954277).

Almost surely, 2^206644115873 is an apocalyptic number.

It is an amenable number.

206644115873 is a deficient number, since it is larger than the sum of its proper divisors (15895701235).

206644115873 is a wasteful number, since it uses less digits than its factorization.

206644115873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15895701234.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 206644115873 in words is "two hundred six billion, six hundred forty-four million, one hundred fifteen thousand, eight hundred seventy-three".