A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5763520 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 28 31 32 35 40 56 62 64 70 80 83 112 124 140 155 160 166 217 224 248 280 310 320 332 415 434 448 496 560 581 620 664 830 868 992 1,085 1,120 1,162 1,240 1,328 1,660 1,736 1,984 2,170 2,240 2,324 2,480 2,573 2,656 2,905 3,320 3,472 4,340 4,648 4,960 5,146 5,312 5,810 6,640 6,944 8,680 9,296 9,920 10,292 11,620 12,865 13,280 13,888 17,360 18,011 18,592 20,584 23,240 25,730 26,560 34,720 36,022 37,184 41,168 46,480 51,460 69,440 72,044 82,336 90,055 92,960 102,920 144,088 164,672 180,110 185,920 205,840 288,176 360,220 411,680 576,352 720,440 823,360 1,152,704 1,440,880 2,881,760 and 5,763,520, with no remainder.
Since 5,763,520 cannot be divided by just 1 and 5,763,520, it is not a prime number.