Which is largest river of the world in terms of length and which one is largest in terms of discharge?

Question

What is the largest river in Europe in terms of length, discharge, and watershed, that flows through central Russia, and has some of the largest reservoirs in the world?

Answer 1

The Nile is the longest river in the world with 6,695 km (4,160 miles) in length.
The Amazon River is the largest river in the world in terms of water discharge with average discharge of about 209,000 cubic metres per second.