The answer is 70 sextillion. So just how big is a sextillion? The largest quantity I knew was a petabyte, but it appears that a sextillion is a million-million-million. So that would be 70 followed by 22 zeros. That is 10 times more than the number of grains of sand on the earth. My guess is that the number is significantly more than this. It seems beyond human comprehension to imagine the vastness of this great universe that God created.
VOA News July 23, 2003