Math::UInt64 - Manipulate 64 bit unsigned integers from Perl
Math::UInt64 is just an alias for Math::Int64, the only reason it exists as an independent package is to allow Storable to load it on demand.
To install Math::Int64, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.