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storing large integers properly

I am storing book isbn numbers in a table. isbn numbers are 10 digit
numbers and many start with 0. The data type of the field I am storing
this info in is a bigint(16) unsigned. It appears that isbns that start
with 0 are going in as 9 digit numbers, the 0 is being ignored or
stripped. I have experienced this before with integer data types
ignoring leading 0s. I'm wondering how to address this? Should I
change the field to a varchar or char data type?

Any advice is appreciated,

thanks,
Eben
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Jul 19 '05 #1
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