Avogadro's number is approximately 6.02214129 × 1023, an almost unfathomably large quantity, greater than the number of grains of sand on the earth.
In an ongoing international effort to redefine the kilogram by 2018, a research team from Italy, Japan and Germany has made it much easier by correlating two of the most precise measurements of Avogadro’s number and obtaining one averaged value. Avogadro’s number is approximately 6.02214129 × 10 23, an almost unfathomably large quantity, greater than the number of grains of sand on the earth or even the number of stars in the universe.
Source-ANI