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68300979084 = 22351317317957
BaseRepresentation
bin111111100111000011…
…100011101110001100
320112022000100020100000
4333213003203232030
52104340022312314
651213235004300
74635363512622
oct774703435614
9215260306300
1068300979084
1126a6a138558
12112a1a39690
136596451930
14343d107512
151b9b3a2209
hexfe70e3b8c

68300979084 has 144 divisors (see below), whose sum is σ = 204159559968. Its totient is φ = 19779406848.

The previous prime is 68300979077. The next prime is 68300979113. The reversal of 68300979084 is 48097900386.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 68300979084.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55834 + ... + 373790.

It is an arithmetic number, because the mean of its divisors is an integer number (1417774722).

Almost surely, 268300979084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68300979084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102079779984).

68300979084 is an abundant number, since it is smaller than the sum of its proper divisors (135858580884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68300979084 is a wasteful number, since it uses less digits than its factorization.

68300979084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318006 (or 317992 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 68300979084 in words is "sixty-eight billion, three hundred million, nine hundred seventy-nine thousand, eighty-four".

Divisors: 1 2 3 4 6 9 12 13 17 18 26 27 34 36 39 51 52 54 68 78 81 102 108 117 153 156 162 204 221 234 243 306 324 351 442 459 468 486 612 663 702 884 918 972 1053 1326 1377 1404 1836 1989 2106 2652 2754 3159 3978 4131 4212 5508 5967 6318 7956 8262 11934 12636 16524 17901 23868 35802 53703 71604 107406 214812 317957 635914 953871 1271828 1907742 2861613 3815484 4133441 5405269 5723226 8266882 8584839 10810538 11446452 12400323 16215807 16533764 17169678 21621076 24800646 25754517 32431614 34339356 37200969 48647421 49601292 51509034 64863228 70268497 74401938 77263551 97294842 103018068 111602907 140536994 145942263 148803876 154527102 194589684 210805491 223205814 281073988 291884526 309054204 334808721 421610982 437826789 446411628 583769052 632416473 669617442 843221964 875653578 1004426163 1264832946 1313480367 1339234884 1751307156 1897249419 2008852326 2529665892 2626960734 3794498838 4017704652 5253921468 5691748257 7588997676 11383496514 17075244771 22766993028 34150489542 68300979084