A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6453200 can be evenly divided by 1 2 4 5 8 10 13 16 17 20 25 26 34 40 50 52 65 68 73 80 85 100 104 130 136 146 170 200 208 221 260 272 292 325 340 365 400 425 442 520 584 650 680 730 850 884 949 1,040 1,105 1,168 1,241 1,300 1,360 1,460 1,700 1,768 1,825 1,898 2,210 2,482 2,600 2,920 3,400 3,536 3,650 3,796 4,420 4,745 4,964 5,200 5,525 5,840 6,205 6,800 7,300 7,592 8,840 9,490 9,928 11,050 12,410 14,600 15,184 16,133 17,680 18,980 19,856 22,100 23,725 24,820 29,200 31,025 32,266 37,960 44,200 47,450 49,640 62,050 64,532 75,920 80,665 88,400 94,900 99,280 124,100 129,064 161,330 189,800 248,200 258,128 322,660 379,600 403,325 496,400 645,320 806,650 1,290,640 1,613,300 3,226,600 and 6,453,200, with no remainder.
Since 6,453,200 cannot be divided by just 1 and 6,453,200, it is not a prime number.