What is the population of the country where the Chetyrekh River is located?
Chetyrekh River: The Chetyrekh River is a river in Krasnoyarsk Krai, Russia. Russia:  At 17125200 km2 , Russia is the largest country in the world by surface area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 144 million people at the end of March 2016.
144 million