A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 795600 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 16 17 18 20 24 25 26 30 34 36 39 40 45 48 50 51 52 60 65 68 72 75 78 80 85 90 100 102 104 117 120 130 136 144 150 153 156 170 180 195 200 204 208 221 225 234 240 255 260 272 300 306 312 325 340 360 390 400 408 425 442 450 468 510 520 585 600 612 624 650 663 680 720 765 780 816 850 884 900 936 975 1,020 1,040 1,105 1,170 1,200 1,224 1,275 1,300 1,326 1,360 1,530 1,560 1,700 1,768 1,800 1,872 1,950 1,989 2,040 2,210 2,340 2,448 2,550 2,600 2,652 2,925 3,060 3,120 3,315 3,400 3,536 3,600 3,825 3,900 3,978 4,080 4,420 4,680 5,100 5,200 5,304 5,525 5,850 6,120 6,630 6,800 7,650 7,800 7,956 8,840 9,360 9,945 10,200 10,608 11,050 11,700 12,240 13,260 15,300 15,600 15,912 16,575 17,680 19,890 20,400 22,100 23,400 26,520 30,600 31,824 33,150 39,780 44,200 46,800 49,725 53,040 61,200 66,300 79,560 88,400 99,450 132,600 159,120 198,900 265,200 397,800 and 795,600, with no remainder.
Since 795,600 cannot be divided by just 1 and 795,600, it is not a prime number.