Hexacosienneacontatetrayottatetracontaoctapetaoctagigahectatriacontapentahexahunthahexamyriahexachiliaenneahectahendecagon

A polygon with 6942048008135666911 sides.

It’s also known as a sexamarijuanaboobiepentasatanemergencagon for the following reasons.

One interior angle is

179.99999999999999999999999999 degrees
One exterior angle is 5.1857895e-17 degrees.

It is the craziest, funniest, and scariest polygon to ever exist.

The hexacosienneacontatetrayottatetracontaoctapetaoctagigahectatriacontapentahexahunthahexamyriahexachiliaenneahectahendecagon is taking hold of my mind.