Base | Representation |
---|---|
bin | 11111001011000111100010… |
… | …10111100011101011101001 |
3 | 22222201110222202110100112122 |
4 | 33211203301113203223221 |
5 | 32441122414221404211 |
6 | 401444121234121025 |
7 | 20303461466526005 |
oct | 1745436127435351 |
9 | 288643882410478 |
10 | 68551727528681 |
11 | 1a92a696060741 |
12 | 783194aa20175 |
13 | 2c33528227847 |
14 | 12cdcc8139705 |
15 | 7dd2c39d16db |
hex | 3e58f15e3ae9 |
68551727528681 has 16 divisors (see below), whose sum is σ = 69464684298240. Its totient is φ = 67639909431120.
The previous prime is 68551727528677. The next prime is 68551727528689. The reversal of 68551727528681 is 18682572715586.
It is a cyclic number.
It is not a de Polignac number, because 68551727528681 - 22 = 68551727528677 is a prime.
It is a super-2 number, since 2×685517275286812 (a number of 28 digits) contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (68551727528689) 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, 1722774896 + ... + 1722814686.
It is an arithmetic number, because the mean of its divisors is an integer number (4341542768640).
Almost surely, 268551727528681 is an apocalyptic number.
It is an amenable number.
68551727528681 is a deficient number, since it is larger than the sum of its proper divisors (912956769559).
68551727528681 is a wasteful number, since it uses less digits than its factorization.
68551727528681 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 53524.
The product of its digits is 451584000, while the sum is 71.
The spelling of 68551727528681 in words is "sixty-eight trillion, five hundred fifty-one billion, seven hundred twenty-seven million, five hundred twenty-eight thousand, six hundred eighty-one".
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