How can I know my database version? I need to know what is my database version.

I'm using DB2 V9.7 on linux 64 bits.
I'm connected to a database and i need to know if it is 32 or 64 bits.

Can someone help me?
If you follow this link there are several ways.
One of them shows you the architecture.

From that page: 

$ db2level
DB21085I  Instance "db2inst5" uses "64" bits and DB2 code release "SQL09071"
with level identifier "08020107".
Informational tokens are "DB2 v9.7.0.1", "s091114", "IP23034", and Fix Pack "1".
Product is installed at "/opt/ibm/db2/V9.7".