Base | Representation |
---|---|
bin | 111111011111111111… |
… | …100111100100010001 |
3 | 20111222202102011110120 |
4 | 333133333213210101 |
5 | 2104114210140440 |
6 | 51153403420453 |
7 | 4632424510404 |
oct | 773777474421 |
9 | 214882364416 |
10 | 68182505745 |
11 | 26a09279802 |
12 | 1126a224729 |
13 | 6577a40873 |
14 | 342b4a7d3b |
15 | 1b90c9ddd0 |
hex | fdffe7911 |
68182505745 has 16 divisors (see below), whose sum is σ = 111752790912. Its totient is φ = 35477075840.
The previous prime is 68182505731. The next prime is 68182505749. The reversal of 68182505745 is 54750528186.
It is not a de Polignac number, because 68182505745 - 27 = 68182505617 is a prime.
It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is not an unprimeable number, because it can be changed into a prime (68182505749) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55432317 + ... + 55433546.
It is an arithmetic number, because the mean of its divisors is an integer number (6984549432).
Almost surely, 268182505745 is an apocalyptic number.
It is an amenable number.
68182505745 is a deficient number, since it is larger than the sum of its proper divisors (43570285167).
68182505745 is a wasteful number, since it uses less digits than its factorization.
68182505745 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 110865912.
The product of its (nonzero) digits is 2688000, while the sum is 51.
The spelling of 68182505745 in words is "sixty-eight billion, one hundred eighty-two million, five hundred five thousand, seven hundred forty-five".
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