Select 64 unique numbers from 1000 to 9999
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 74,232,167,137,879,685,245,852,771,530,785,172,077,267,452,979,725,153,255,157,650,964,070,397,428,598,307,853,495,769,216,122,327,386,403,553,369,470,594,209,005,791,714,810,364,387,579,520,997,047,235,071,195,480,064 (~7.423216713788E+145 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 9,419,091,957,635,358,183,748,002,949,907,097,794,531,521,896,104,242,335,453,093,112,436,501,411,090,533,696,995,277,456,933,878,750,909,726,971,560,593,386,583,652,846,643,080,232,595,778,509,785,647,283,063,239,495,941,740,340,966,271,697,553,946,740,362,309,460,865,911,011,697,221,514,781,114,291,298,874,687,537,826,164,708,999,168 (~9.4190919576354E+234 million trillion)
If order does not matter (e.g. most lottery numbers): 74,232,167,137,879,685,245,852,771,530,785,172,077,267,452,979,725,153,255,157,650,964,070,397,428,598,307,853,495,769,216,122,327,386,403,553,369,470,594,209,005,791,714,810,364,387,579,520,997,047,235,071,195,480,064 (~7.423216713788E+145 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 9,419,091,957,635,358,183,748,002,949,907,097,794,531,521,896,104,242,335,453,093,112,436,501,411,090,533,696,995,277,456,933,878,750,909,726,971,560,593,386,583,652,846,643,080,232,595,778,509,785,647,283,063,239,495,941,740,340,966,271,697,553,946,740,362,309,460,865,911,011,697,221,514,781,114,291,298,874,687,537,826,164,708,999,168 (~9.4190919576354E+234 million trillion)
