The sha1 hash for 64test64xa is 6779c53432b8badf049bb9d8924a5785dd887243 which is 41 characters only using hexadecimal, 10digits and 6letters. But how long it would be if it was using the whole 26 letters in the latin alphabet? What if it also differentiated between UPPER and lower cases?
https://www.unitconverters.net/numbers/decimal-to-base-36.htm
base 10 = 590741618446309885662238049322513167918815539779
base 16 = 6779C53432B8BADF049BB9D8924A5785DD887243
base 36 = C34WAO39N9K9XWPHW5W9XGRH0AHT0CG