64 = 1 + 2 + 3 + 4 + 5 × 6 + 7 + 8 + 9
64 = 9 + 8 + 7 + 6 × 5 + 4 + 3 + 2 + 1
64 = 0^5 + 1^8 − 2^7 − 3^9 + 4^3 + 5^6 + 6^0 + 7^1 + 8^4 + 9^2
64 = (1 + 1)((1+1)×(1+1+1))
= 2(2+2+2)
= (3 + 3/3)3
= 4 × 4 × 4
= 55 + 5 + 5 − 5/5
= ((6 + 6)/6)6
= 77 − 7 − 7 + 7/7
= 8 × 8
= (9 − 9/9) × (9 − 9/9)
Cube: a(n) = n^3, n = 4
Moser-de Bruijn sequence: sums of distinct powers of 4
Cake number, maximal number of pieces resulting from 7 planar cuts through a cube (or cake)
Numbers of edges of regular polygon constructible with unmarked straightedge and compass.
Factors: 1, 2, 4, 8, 16, 32, 64
Sixty-four
Representations, Binary to Hexadecimal:
1000000_2
2101_3
1000_4
224_5
144_6
121_7
100_8
71_9
59_11
54_12
4c_13
48_14
44_15
40_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
