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68836342880 = 2551747538457
BaseRepresentation
bin100000000011011110…
…1110011110001100000
320120200022201112101202
41000012331303301200
52111434100433010
651342321420332
74654554155204
oct1000675636140
9216608645352
1068836342880
1127214359278
121141119a6a8
136650339246
143490266b04
151bcd3a36a5
hex1006f73c60

68836342880 has 96 divisors (see below), whose sum is σ = 175856075136. Its totient is φ = 25363431424.

The previous prime is 68836342871. The next prime is 68836342933. The reversal of 68836342880 is 8824363886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141389 + ... + 397068.

It is an arithmetic number, because the mean of its divisors is an integer number (1831834116).

Almost surely, 268836342880 is an apocalyptic number.

It is an amenable number.

68836342880 is an abundant number, since it is smaller than the sum of its proper divisors (107019732256).

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

68836342880 is a wasteful number, since it uses less digits than its factorization.

68836342880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538536 (or 538528 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 68836342880 in words is "sixty-eight billion, eight hundred thirty-six million, three hundred forty-two thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 17 20 32 34 40 47 68 80 85 94 136 160 170 188 235 272 340 376 470 544 680 752 799 940 1360 1504 1598 1880 2720 3196 3760 3995 6392 7520 7990 12784 15980 25568 31960 63920 127840 538457 1076914 2153828 2692285 4307656 5384570 8615312 9153769 10769140 17230624 18307538 21538280 25307479 36615076 43076560 45768845 50614958 73230152 86153120 91537690 101229916 126537395 146460304 183075380 202459832 253074790 292920608 366150760 404919664 430227143 506149580 732301520 809839328 860454286 1012299160 1464603040 1720908572 2024598320 2151135715 3441817144 4049196640 4302271430 6883634288 8604542860 13767268576 17209085720 34418171440 68836342880