System Information
Windows 10 Fall Creators Update and Nvidia GTX 750Ti

Blender Version
Blender 2.79.1 e59cf13
Date: 2018-01-01

Short description of error

Open blender, do it on a default cube and rotate with a number along with an axis of your choice
ex.

Select Cube, rotate (R) on Z axis + 90
and result stated
Rot: [90] = 5157' along global Z
on viewport
the cube would rotate around 45 degrees