Compare 640 vs 645

Property	640	645
Type	composite number	composite number
Unique factors	2	3
Total factors	8	3
Prime factorization	2⁷ × 5¹	3¹ × 5¹ × 43¹
Prime factorization	2 × 2 × 2 × 2 × 2 × 2 × 2 × 5	3 × 5 × 43
Divisors count	16	8
Divisors	1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640	1, 3, 5, 15, 43, 129, 215, 645
Number of properties	0	0
Roman numberals	DCXL	DCXLV
Base 2	1010000000₂	1010000101₂
Base 3	212201₃	212220₃
Base 4	22000₄	22011₄
Base 5	10030₅	10040₅
Base 6	2544₆	2553₆
Base 7	1603₇	1611₇
Base 8	1200₈	1205₈
Base 9	781₉	786₉
Base 10	640₁₀	645₁₀
Base 11	532₁₁	537₁₁
Base 12	454₁₂	459₁₂
Base 13	3a3₁₃	3a8₁₃
Base 14	33a₁₄	341₁₄
Base 15	2ca₁₅	2d0₁₅
Base 16	280₁₆	285₁₆