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68159714105 = 5731974911319
BaseRepresentation
bin111111011110101000…
…101011001100111001
320111221011112020012202
4333132220223030321
52104042341322410
651151231115545
74632030003440
oct773650531471
9214834466182
1068159714105
11269a742203a
1211262672bb5
1365730c08a2
143428453d57
151b8dc9aca5
hexfdea2b339

68159714105 has 64 divisors (see below), whose sum is σ = 97758904320. Its totient is φ = 44639078400.

The previous prime is 68159714071. The next prime is 68159714111. The reversal of 68159714105 is 50141795186.

It is not a de Polignac number, because 68159714105 - 212 = 68159710009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68159714105.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51674636 + ... + 51675954.

It is an arithmetic number, because the mean of its divisors is an integer number (1527482880).

Almost surely, 268159714105 is an apocalyptic number.

It is an amenable number.

68159714105 is a deficient number, since it is larger than the sum of its proper divisors (29599190215).

68159714105 is a wasteful number, since it uses less digits than its factorization.

68159714105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 68159714105 in words is "sixty-eight billion, one hundred fifty-nine million, seven hundred fourteen thousand, one hundred five".

Divisors: 1 5 7 31 35 97 155 217 485 491 679 1085 1319 2455 3007 3395 3437 6595 9233 15035 15221 17185 21049 40889 46165 47627 76105 105245 106547 127943 204445 238135 286223 333389 532735 639715 647629 895601 1431115 1476437 1666945 3238145 3966233 4478005 4533403 7382185 10335059 19831165 20076499 22667015 27763631 51675295 62820013 100382495 138818155 140535493 314100065 439740091 702677465 1947420403 2198700455 9737102015 13631942821 68159714105