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1638 centimeters is equal to 645.669291 inches.

This is approximately the height of a standard refrigerator, which typically ranges from 65-69 inches tall.

It is also roughly the same length as 1.5 standard door widths, which are typically 36 inches wide.

In addition, it is slightly longer than the height of an average human being, which is approximately 64 inches.

1638 centimeters is also equal to 17.6 meters, which is approximately the length of a standard swimming pool in the Olympics.