A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5653800 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 27 30 36 40 45 50 54 60 72 75 81 90 100 108 120 135 150 162 180 200 216 225 270 300 324 349 360 405 450 540 600 648 675 698 810 900 1,047 1,080 1,350 1,396 1,620 1,745 1,800 2,025 2,094 2,700 2,792 3,141 3,240 3,490 4,050 4,188 5,235 5,400 6,282 6,980 8,100 8,376 8,725 9,423 10,470 12,564 13,960 15,705 16,200 17,450 18,846 20,940 25,128 26,175 28,269 31,410 34,900 37,692 41,880 47,115 52,350 56,538 62,820 69,800 75,384 78,525 94,230 104,700 113,076 125,640 141,345 157,050 188,460 209,400 226,152 235,575 282,690 314,100 376,920 471,150 565,380 628,200 706,725 942,300 1,130,760 1,413,450 1,884,600 2,826,900 and 5,653,800, with no remainder.
Since 5,653,800 cannot be divided by just 1 and 5,653,800, it is not a prime number.