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1646 centimeters is equal to 648.03 inches.

To put this into perspective, the average height of a giraffe is approximately 504 inches and the height of the Empire State Building is 1472 inches. This means that 1646 centimeters is taller than a giraffe and almost half the height of the Empire State Building. In terms of everyday objects, 1646 centimeters is taller than most doors which typically range from 76-96 inches. It is also approximately the same height as a standard refrigerator (approximately 648 inches).