I think what he/she means is: What is the last WHOLE INTEGER ??? If that is what is meant, then:
1,000,000, 500,000, 2,500,000, 1,250,000, 6,250,000, 3,125,000,15,625,000, 7,812,500, 39,062,500, 19,531,250, 97,656,250, 48,828,125, 244,140,625.
The last WHOLE INTEGER is =244,140,625 =5^12