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68675862680 = 23519722738393
BaseRepresentation
bin111111111101011001…
…101000000010011000
320120021010202021221122
4333331121220002120
52111122010101210
651314350024412
74650565125665
oct777531500230
9216233667848
1068675862680
1127141809107
12113874a8108
13662600b049
143476c10a6c
151bbe253b55
hexffd668098

68675862680 has 64 divisors (see below), whose sum is σ = 155993286240. Its totient is φ = 27209792512.

The previous prime is 68675862677. The next prime is 68675862701. The reversal of 68675862680 is 8626857686.

It is a super-2 number, since 2×686758626802 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1769564 + ... + 1807956.

Almost surely, 268675862680 is an apocalyptic number.

It is an amenable number.

68675862680 is an abundant number, since it is smaller than the sum of its proper divisors (87317423560).

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

68675862680 is a wasteful number, since it uses less digits than its factorization.

68675862680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38828 (or 38824 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 68675862680 in words is "sixty-eight billion, six hundred seventy-five million, eight hundred sixty-two thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 197 227 394 454 788 908 985 1135 1576 1816 1970 2270 3940 4540 7880 9080 38393 44719 76786 89438 153572 178876 191965 223595 307144 357752 383930 447190 767860 894380 1535720 1788760 7563421 8715211 15126842 17430422 30253684 34860844 37817105 43576055 60507368 69721688 75634210 87152110 151268420 174304220 302536840 348608440 1716896567 3433793134 6867586268 8584482835 13735172536 17168965670 34337931340 68675862680