Base | Representation |
---|---|
bin | 111111111110100101… |
… | …110101010101101011 |
3 | 20120022112100020211100 |
4 | 333332211311111223 |
5 | 2111142113340412 |
6 | 51320342132443 |
7 | 4651230002136 |
oct | 777645652553 |
9 | 216275306740 |
10 | 68695840107 |
11 | 27152013484 |
12 | 11392121123 |
13 | 662a1b40cb |
14 | 347973121d |
15 | 1bc0d9cedc |
hex | ffe97556b |
68695840107 has 24 divisors (see below), whose sum is σ = 106844989680. Its totient is φ = 42372702720.
The previous prime is 68695840067. The next prime is 68695840159. The reversal of 68695840107 is 70104859686.
It is not a de Polignac number, because 68695840107 - 26 = 68695840043 is a prime.
It is not an unprimeable number, because it can be changed into a prime (68695840007) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3795994 + ... + 3814047.
It is an arithmetic number, because the mean of its divisors is an integer number (4451874570).
Almost surely, 268695840107 is an apocalyptic number.
68695840107 is a deficient number, since it is larger than the sum of its proper divisors (38149149573).
68695840107 is a wasteful number, since it uses less digits than its factorization.
68695840107 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7610123 (or 7610120 counting only the distinct ones).
The product of its (nonzero) digits is 2903040, while the sum is 54.
The spelling of 68695840107 in words is "sixty-eight billion, six hundred ninety-five million, eight hundred forty thousand, one hundred seven".
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