Correction for the weight of an American Football
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How heavy is 5,000,000,000,000 nanograms?
It's about twelve times as heavy as an American Football
The weight of an American Football is about 411,068,085,312.50 nanograms.
(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 396,893,323,750 nanograms and 425,242,846,875 nanograms. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.