Out of the 901 million Facebook users, 488 million of those log into the social network using a mobile device. A new infographic, courtesy of the kind folks at socialbakers has revealed some interesting demographic data regarding the word’s largest social media platform:

Interestingly, the study shows that Android and iPhone are neck and neck when it comes to mobile Facebook usage, both at 19%. RIM/Blackberry use beats out iPad at 8% and 5% respectively. The U.S. has the most mobile Facebook users with roughly 106 million, and Indonesia (?) comes in second at about 29 million.

As for Facebook mobile penetration, 81% of Nigerians access the social network via a handheld device. In Japan, where Facebook adoption is still a bit culturally iffy but still gaining traction, 72% use their phones.

All in all, over half (54%) of Facebook users access the site via mobile, though the study is not clear on the overlap – surely a huge amount of users access the network using both desktops and their phones.