The first 32 perfect squares, 1, 4, 9, 16, 25, …, 961, 1024 are combined together into one large number by appending their digits in succession, forming the number N=1491625…9611024. How many digits does N have?<spanclass=′latex−bold′>(A)</span>84<spanclass=′latex−bold′>(B)</span>85<spanclass=′latex−bold′>(C)</span>86<spanclass=′latex−bold′>(D)</span>87<spanclass=′latex−bold′>(E)</span>88