A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5537952 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 32 36 41 42 48 56 63 67 72 82 84 96 112 123 126 134 144 164 168 201 224 246 252 268 287 288 328 336 369 402 469 492 504 536 574 603 656 672 738 804 861 938 984 1,008 1,072 1,148 1,206 1,312 1,407 1,476 1,608 1,722 1,876 1,968 2,016 2,144 2,296 2,412 2,583 2,747 2,814 2,952 3,216 3,444 3,752 3,936 4,221 4,592 4,824 5,166 5,494 5,628 5,904 6,432 6,888 7,504 8,241 8,442 9,184 9,648 10,332 10,988 11,256 11,808 13,776 15,008 16,482 16,884 19,229 19,296 20,664 21,976 22,512 24,723 27,552 32,964 33,768 38,458 41,328 43,952 45,024 49,446 57,687 65,928 67,536 76,916 82,656 87,904 98,892 115,374 131,856 135,072 153,832 173,061 197,784 230,748 263,712 307,664 346,122 395,568 461,496 615,328 692,244 791,136 922,992 1,384,488 1,845,984 2,768,976 and 5,537,952, with no remainder.
Since 5,537,952 cannot be divided by just 1 and 5,537,952, it is not a prime number.