Base | Representation |
---|---|
bin | 11000100111001111110… |
… | …110101100011100110101 |
3 | 12222200211020010112202012 |
4 | 120213033312230130311 |
5 | 210203001244301020 |
6 | 3333004524454005 |
7 | 233125462263545 |
oct | 30471766543465 |
9 | 5880736115665 |
10 | 1691409368885 |
11 | 5a2360548255 |
12 | 2339816aa305 |
13 | c3664a272b2 |
14 | 5bc16859325 |
15 | 2dee65567c5 |
hex | 189cfdac735 |
1691409368885 has 8 divisors (see below), whose sum is σ = 2032828327296. Its totient is φ = 1351036105360.
The previous prime is 1691409368881. The next prime is 1691409368977. The reversal of 1691409368885 is 5888639041961.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 1691409368885 - 22 = 1691409368881 is a prime.
It is a super-2 number, since 2×16914093688852 (a number of 25 digits) contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1691409368881) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261420161 + ... + 261426630.
It is an arithmetic number, because the mean of its divisors is an integer number (254103540912).
Almost surely, 21691409368885 is an apocalyptic number.
It is an amenable number.
1691409368885 is a deficient number, since it is larger than the sum of its proper divisors (341418958411).
1691409368885 is an equidigital number, since it uses as much as digits as its factorization.
1691409368885 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 522847443.
The product of its (nonzero) digits is 89579520, while the sum is 68.
The spelling of 1691409368885 in words is "one trillion, six hundred ninety-one billion, four hundred nine million, three hundred sixty-eight thousand, eight hundred eighty-five".
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