A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4814544 can be evenly divided by 1 2 3 4 6 7 8 12 14 16 21 23 24 28 42 46 48 49 56 69 84 89 92 98 112 138 147 161 168 178 184 196 267 276 294 322 336 356 368 392 483 534 552 588 623 644 712 784 966 1,068 1,104 1,127 1,176 1,246 1,288 1,424 1,869 1,932 2,047 2,136 2,254 2,352 2,492 2,576 3,381 3,738 3,864 4,094 4,272 4,361 4,508 4,984 6,141 6,762 7,476 7,728 8,188 8,722 9,016 9,968 12,282 13,083 13,524 14,329 14,952 16,376 17,444 18,032 24,564 26,166 27,048 28,658 29,904 32,752 34,888 42,987 49,128 52,332 54,096 57,316 69,776 85,974 98,256 100,303 104,664 114,632 171,948 200,606 209,328 229,264 300,909 343,896 401,212 601,818 687,792 802,424 1,203,636 1,604,848 2,407,272 and 4,814,544, with no remainder.
Since 4,814,544 cannot be divided by just 1 and 4,814,544, it is not a prime number.