Octahexadecahemihexadecachoron

The octahexadecahemihexadecachoron, or ohuhoh, is a uniform polychoron. It has 16 tetrahemihexahedra, 8 octahedra, and 8 central cuboctahedra, with 4 tetrahemihexahedra, 2 octahedra, and 4 cuboctahedra at each vertex.

As well as being isogonal, it is also isotoxal.