0
as far as i know the Egyptian numeral system doesn't use zero. sorry i couldn't be more help ;)
See link below.
The longest Egyptian numeral between 500 and 1500 is 999.That is 9 coiled ropes, 9 heel bones and 9 vertical staffs.
See related links. The Egyptian numeral system actually originated from hieroglyphics.
there is difficulty in the mathematical opperations
there is no zero