Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C25×C4 |
| direct product | C2×#65529 |
| Sylow | C5 ⋊ C2×#410 |
788 conjugacy classes of subgroups.
| transitive degree | μt(G) = 160 |
124 conjugacy classes — view the full character table.
| maximal subgroup of | #12004627, #12004628, #12004632, … |
| maximal normal subgroup of | #12004627, #12004628, #12004632, … |
| maximal quotient of | C2×#10602364, C2×#10602394, C2×#10602417, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 17898);