Thanks, I was born after the conversion and should have checked. Sadly I can't edit my comment.
I remember being told it was base 60, which fit comfortably with the pounds/shilling system I did have as a kid -- but had I been a 7-year-old programmer like all the kids are these days I probably would have been super excited by 64.
> I remember being told it was base 60, which fit comfortably with the pounds/shilling system I did have as a kid
??? Pounds-shillings-pence weren't base 60: there were 20 shillings in a pound & 12 pennies in a shilling. That did happen to work out to 240 pence to the pound, which happens to be 4 × 60, but it wasn't a base-60 system.
The pre-decimalized currency was 16 anna to the rupee and 4 paise to the anna. There was no base-60 denomination.