According to Eddington, the exact number of protons in the universe, where 136 was the reciprocal of the fine structure constant as best as it could be measured in his time.

# Eddington Number

## See also

Large Number, Wyler's Constant## Explore with Wolfram|Alpha

## References

Hardy, G. H.*Ramanujan: Twelve Lectures on Subjects Suggested by His Life and Work, 3rd ed.*New York: Chelsea, pp. 15 and 49, 1999.

## Referenced on Wolfram|Alpha

Eddington Number## Cite this as:

Weisstein, Eric W. "Eddington Number."
From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/EddingtonNumber.html