Some 37 million were from within the UK, the BBC said. The figure includes both mobile and computer access.
The peak traffic moment was on 1 August, when cyclist Bradley Wiggins won his gold medal in the men's time trial.
But 3 August - the start of the women's heptathlon featuring Jessica Ennis - was the busiest day as a whole.
There were also 106 million requests for online video during the games .
This was up from 32 million during the Beijing Olympics.
Nearly two million people downloaded the BBC's Olympics smartphone app on both Apple's iOS and Google's Android platforms.
"Our aspiration was that just as the Coronation did for TV in 1953, the Olympics would do for digital in 2012," said Phil Fearnley, General Manager, News and Knowledge, BBC Future Media."