Base | Representation |
---|---|
bin | 11000011111110001… |
… | …00100000011011100 |
3 | 1020221112122201120120 |
4 | 30033320210003130 |
5 | 203413223402433 |
6 | 10012555514540 |
7 | 643621644453 |
oct | 141770440334 |
9 | 36845581516 |
10 | 13151387868 |
11 | 56396853a3 |
12 | 2670458a50 |
13 | 1317868518 |
14 | 8ca8d5b9a |
15 | 51e8a77b3 |
hex | 30fe240dc |
13151387868 has 24 divisors (see below), whose sum is σ = 30700832400. Its totient is φ = 4381758720.
The previous prime is 13151387813. The next prime is 13151387897. The reversal of 13151387868 is 86878315131.
It is a self number, because there is not a number n which added to its sum of digits gives 13151387868.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227643 + ... + 279506.
It is an arithmetic number, because the mean of its divisors is an integer number (1279201350).
Almost surely, 213151387868 is an apocalyptic number.
It is an amenable number.
13151387868 is an abundant number, since it is smaller than the sum of its proper divisors (17549444532).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13151387868 is a wasteful number, since it uses less digits than its factorization.
13151387868 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 509317 (or 509315 counting only the distinct ones).
The product of its digits is 967680, while the sum is 51.
The spelling of 13151387868 in words is "thirteen billion, one hundred fifty-one million, three hundred eighty-seven thousand, eight hundred sixty-eight".
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