SIX GIGAS OF INFORMATION. “Human DNA genome encodes 4^(3 billion) = 2^(6 billion) choices, or 6 billion bits of information. The epigenome encodes at least 2^22,500 choices, or 22,500 bits. The total information is 6,000,022,500 bits, or approximately 6 Gb (gigabits).”
http://www.decodedscience.org/comparing-genetic-code-dna-binary-code/55476