There's no one of consequence named alvarado but what i think you're referring to is Avogadro's number. That's probably the reason you couldn't find it. Anyways, it's 6.022 x 10^23.
Yes - there is an infinite number of such numbers. Just take the counting numbers (1,2,3,4, etc...) and put them to the power of 6 (i.e. multiply it by itself 6 times). The sequence of such numbers...