I did wonder about the spare 934.4 metres when I wrote that, but - after a quick glance at the AUK sites it seems that only Audaxes less than 100km ever have a distance that's precise to the kilometre. Above that everything is divisible by 10k. So you do see 52 or 61 km rides, but above 100k it's only 100, 110 etc. It may be one of the rules, I dunno.Amended that for you.
So if you want to ride an imperial century and no further, with the maximum amount as part of an Audax event, then you'd have to choose a 160km event and take care of the extra 3,065' 7½" yourself.