Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C25 |
| direct product | C4×#4040 |
| Fitting | C4×C5×C4⋊C4 ⋊ C2 |
| Sylow | C5 ⋊ C4×#123 |
688 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
136 conjugacy classes — view the full character table.
| maximal subgroup of | #12106258, C8×#4040, #12106269, … |
| maximal normal subgroup of | #12106258, C8×#4040, #12106269, … |
| maximal quotient of | C4×#64954, C4×#64958, C4×#65279, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 7570);