Base | Representation |
---|---|
bin | 111111111110011111… |
… | …011101011100011000 |
3 | 20120022102012101000010 |
4 | 333332133131130120 |
5 | 2111141201404433 |
6 | 51320242241520 |
7 | 4651206543156 |
oct | 777637353430 |
9 | 216272171003 |
10 | 68694169368 |
11 | 27151082200 |
12 | 113916562a0 |
13 | 6629a4a7c6 |
14 | 34794183d6 |
15 | 1bc0b6ce63 |
hex | ffe7dd718 |
68694169368 has 96 divisors (see below), whose sum is σ = 196974489600. Its totient is φ = 19911334080.
The previous prime is 68694169363. The next prime is 68694169393. The reversal of 68694169368 is 86396149686.
It is a Harshad number since it is a multiple of its sum of digits (66).
It is a junction number, because it is equal to n+sod(n) for n = 68694169299 and 68694169308.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (68694169363) 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, 447448 + ... + 581031.
It is an arithmetic number, because the mean of its divisors is an integer number (2051817600).
Almost surely, 268694169368 is an apocalyptic number.
It is an amenable number.
68694169368 is an abundant number, since it is smaller than the sum of its proper divisors (128280320232).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68694169368 is a wasteful number, since it uses less digits than its factorization.
68694169368 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1028533 (or 1028518 counting only the distinct ones).
The product of its digits is 80621568, while the sum is 66.
The spelling of 68694169368 in words is "sixty-eight billion, six hundred ninety-four million, one hundred sixty-nine thousand, three hundred sixty-eight".
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