Finite Group DatabasebetaFinite Group DatabasebetaOrder 640.
16 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | C5×C64 | C2 | 1 | 1 | yes | maximal, characteristic |
| 2 | C5×C32 | C4 | 1 | 1 | yes | characteristic |
| 3 | C128 | — | 5 | 1 | no | maximal, Sylow |
| 4 | C5×C16 | C8 | 1 | 1 | yes | characteristic |
| 5 | C64 | D5 | 1 | 1 | yes | characteristic |
| 6 | C5×C8 | C16 | 1 | 1 | yes | characteristic |
| 7 | C32 | Dic5 | 1 | 1 | yes | characteristic |
| 8 | C4×C5 | C32 | 1 | 1 | yes | characteristic |
| 9 | C16 | #168 | 1 | 1 | yes | characteristic |
| 10 | C2×C5 | C64 | 1 | 1 | yes | characteristic |
| 11 | C8 | #672 | 1 | 1 | yes | characteristic |
| 12 | C5 | C128 | 1 | 1 | yes | characteristic, complemented, Sylow |
| 13 | C4 | #3926 | 1 | 1 | yes | characteristic |
| 14 | C2 | #64663 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center, Frattini, hypercenter | C64 | D5 |
| commutator, hypocenter | C5 | C128 |
| Fitting, cosocle | C5×C64 | C2 |
| socle, prime radical | C2×C5 | C64 |
| LCS | G ▷ C5 | |
| UCS | C1 ◁ C64 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 12. C5 | C128 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C5×C64 | 2 |
| C128 | 5 |