A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6012864 can be evenly divided by 1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 32 33 36 39 44 48 52 64 66 72 73 78 88 96 99 104 117 132 143 144 146 156 176 192 198 208 219 234 264 286 288 292 312 352 396 416 429 438 468 528 572 576 584 624 657 704 792 803 832 858 876 936 949 1,056 1,144 1,168 1,248 1,287 1,314 1,584 1,606 1,716 1,752 1,872 1,898 2,112 2,288 2,336 2,409 2,496 2,574 2,628 2,847 3,168 3,212 3,432 3,504 3,744 3,796 4,576 4,672 4,818 5,148 5,256 5,694 6,336 6,424 6,864 7,008 7,227 7,488 7,592 8,541 9,152 9,636 10,296 10,439 10,512 11,388 12,848 13,728 14,016 14,454 15,184 17,082 19,272 20,592 20,878 21,024 22,776 25,696 27,456 28,908 30,368 31,317 34,164 38,544 41,184 41,756 42,048 45,552 51,392 57,816 60,736 62,634 68,328 77,088 82,368 83,512 91,104 93,951 115,632 125,268 136,656 154,176 167,024 182,208 187,902 231,264 250,536 273,312 334,048 375,804 462,528 501,072 546,624 668,096 751,608 1,002,144 1,503,216 2,004,288 3,006,432 and 6,012,864, with no remainder.
Since 6,012,864 cannot be divided by just 1 and 6,012,864, it is not a prime number.