Big int in picolisp

[C K Kashyap]

Hi Alex,
I am trying to understand how big integers are stored in Picolisp. I notice
that the ASCII values of the digits are stored in some cases - for example
1234 is stored as 0x34333231. That does not look like the format that's
used always - I am going by the "> 999999999" references in the code. I
cant seem to understand it by reading the code :( I'd really appreciate
some explanation.
Regards,
Kashyap