[Urgent] Can mysql store more than 10 digits?

One of my table is in this format "MyISAM, latin1_swedish_ci"
It's a rapidshare traffic checker and, my script will update itself and store it in DB.

It was working previously, but today, it isn't storing the properly. The CORRECT value is -2 216 558 000. Yes with negative.
THhe problem is, the script is suppose to delete the account store when traffic is <=
but it didn't :s when i check the last stored traffic value, it was 5475

So
(1) Is it due to php not reading the -2 216 558 000 properly or is it mysql fault?

 

What field type for the number did you use in your database ?
Hre is an overview of the field types in MYSQL: http://help.scibit.com/mascon/masconMySQL_Field_Types.html

 

Use BIGINT instead of INT and use a higher scale