10 trillion - # of cells in the human body

10-100 billion - # of neurons in the human brain
100 trillion - # of microbes in and on the human body

100 trillion to 1 quadrillion - # of neuron connections (synapses) in the brain.
100 million - # of chess moves IBM's Deep Blue computer calculates per second

22.8 trillion - # of operations per second that can be performed by the Blue brain (a 10000 processor simulation of a rat's .5mm by 2mm neocortical column)
10 million - # of times faster (on average) a supercomputer can compute compared to a human brain

1 billion - # of computer processors that would need to work simultaneously to mimic the parallelism of the human brain

3 billion - # of dollars it would take to annually supply the energy for a full computer model of the human brain.