A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4325616 can be evenly divided by 1 2 3 4 6 8 9 12 16 17 18 19 24 27 31 34 36 38 48 51 54 57 62 68 72 76 93 102 108 114 124 136 144 152 153 171 186 204 216 228 248 272 279 304 306 323 342 372 408 432 456 459 496 513 527 558 589 612 646 684 744 816 837 912 918 969 1,026 1,054 1,116 1,178 1,224 1,292 1,368 1,488 1,581 1,674 1,767 1,836 1,938 2,052 2,108 2,232 2,356 2,448 2,584 2,736 2,907 3,162 3,348 3,534 3,672 3,876 4,104 4,216 4,464 4,712 4,743 5,168 5,301 5,814 6,324 6,696 7,068 7,344 7,752 8,208 8,432 8,721 9,424 9,486 10,013 10,602 11,628 12,648 13,392 14,136 14,229 15,504 15,903 17,442 18,972 20,026 21,204 23,256 25,296 28,272 28,458 30,039 31,806 34,884 37,944 40,052 42,408 46,512 56,916 60,078 63,612 69,768 75,888 80,104 84,816 90,117 113,832 120,156 127,224 139,536 160,208 180,234 227,664 240,312 254,448 270,351 360,468 480,624 540,702 720,936 1,081,404 1,441,872 2,162,808 and 4,325,616, with no remainder.
Since 4,325,616 cannot be divided by just 1 and 4,325,616, it is not a prime number.