Hecatonicosihexacositruncated hexacosihecatonicosachoron

The hecatonicosihexacositruncated hexacosihecatonicosachoron, or hixtixhi, is a nonconvex uniform polychoron that consists of 600 truncated tetrahedra, 120 truncated great dodecahedra, 120 great dodecicosidodecahedra, and 120 icosidodecatruncated icosidodecahedra. 1 truncated tetrahedron, 1 truncated great dodecahedron, 1 great dodecicosidodecahedron, and 2 icosidodecatruncated icosidodecahedra join at each vertex.

Related polychora
The hecatonicosihexacositruncated hexacosihecatonicosachoron is the colonel of a 3-member regiment that also includes the great hexacositrishecatonicosachoron and great rhombic trishecatonicosachoron.