What is the name of the second longest river in the world and how long is it?

The Amazon River in South America. The length of the Nile river is 7,088 km (4,405 miles). It is the longest river of the world. The length of the Amazon river is 6,575 km (4,086 miles).SOURCE: S. Liu, P. Lu, D. Liu, P. Jin, W. Wang, Pinpointing the sources and measuring the lengths of the principal rivers of the world, International Journal of Digital Earth, Volume 2, Issue 1 March 2009 , pages 80 - 87,DOI: 10.1080/17538940902746082