It is all explained here:
http://support.sas.com/documentation/cdl/en/lrcon/62955/HTML/default/viewer.htm#a000695157.htm
and
http://www.sascommunity.org/wiki/Numeric_representation_issues_in_SAS
The larger integer sas can accurately represent with 8 bytes is 9,007,199,254,740,990 under Windows and 72,057,594,037,927,900 on mainframes.
Your number 12,345,678,912,345,445 is too large for the Windows platform.
It's finally time to hack! Remember to visit the SAS Hacker's Hub regularly for news and updates.
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Ready to level-up your skills? Choose your own adventure.