Small diretrosnub prismatosnub trishexacositrishexacosichoron

The small diretrosnub prismatosnub trishexacositrishexacosichoron, or saderspostixtox, is a nonconvex uniform polychoron that consists of 600 great icosahedra, 1200 icosahedra (some of which lie in the same hyperplanes, forming 600 snub disoctahedra), 4800 octahemioctahedra (forming 2400 compounds of two), 600 small dodecicosahedra, 600 icosidodecadodecahedra, 600 small rhombicosidodecahedra, and 3600 pentagrammic prisms.

One great icosahedron, two icosahedra (two compounds), eight octahemioctahedra (eight compounds), five small dodecicosahedra, five icosidodecadodecahedra, five small rhombicosidodecahedra, and five pentagrammic prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary dishecatonicosihexacosihecatonicosachora and 5 small based dipentary trishecatonicosiprismatohexacosichora. In the process, some of the octahemioctahedron cells blend out.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small diretrosnub disnub decahecatonicosadishexacosichoron.