A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9637776 can be evenly divided by 1 2 3 4 6 8 9 12 16 17 18 24 31 34 36 48 51 62 68 72 93 102 124 127 136 144 153 186 204 248 254 272 279 306 372 381 408 496 508 527 558 612 744 762 816 1,016 1,054 1,116 1,143 1,224 1,488 1,524 1,581 2,032 2,108 2,159 2,232 2,286 2,448 3,048 3,162 3,937 4,216 4,318 4,464 4,572 4,743 6,096 6,324 6,477 7,874 8,432 8,636 9,144 9,486 11,811 12,648 12,954 15,748 17,272 18,288 18,972 19,431 23,622 25,296 25,908 31,496 34,544 35,433 37,944 38,862 47,244 51,816 62,992 66,929 70,866 75,888 77,724 94,488 103,632 133,858 141,732 155,448 188,976 200,787 267,716 283,464 310,896 401,574 535,432 566,928 602,361 803,148 1,070,864 1,204,722 1,606,296 2,409,444 3,212,592 4,818,888 and 9,637,776, with no remainder.
Since 9,637,776 cannot be divided by just 1 and 9,637,776, it is not a prime number.