Base | Representation |
---|---|
bin | 10111110111101011… |
… | …01010101000110111 |
3 | 1020002002211201111222 |
4 | 23323311222220313 |
5 | 202221130142322 |
6 | 5515343420555 |
7 | 632366263121 |
oct | 137365525067 |
9 | 36062751458 |
10 | 12815084087 |
11 | 5486865393 |
12 | 25978b475b |
13 | 1292c993c0 |
14 | 897d92211 |
15 | 5000c6e42 |
hex | 2fbd6aa37 |
12815084087 has 16 divisors (see below), whose sum is σ = 14535521280. Its totient is φ = 11209215072.
The previous prime is 12815084069. The next prime is 12815084089. The reversal of 12815084087 is 78048051821.
It is a cyclic number.
It is not a de Polignac number, because 12815084087 - 216 = 12815018551 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12815084089) 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, 168287 + ... + 232272.
It is an arithmetic number, because the mean of its divisors is an integer number (908470080).
Almost surely, 212815084087 is an apocalyptic number.
12815084087 is a deficient number, since it is larger than the sum of its proper divisors (1720437193).
12815084087 is a wasteful number, since it uses less digits than its factorization.
12815084087 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 400702.
The product of its (nonzero) digits is 143360, while the sum is 44.
The spelling of 12815084087 in words is "twelve billion, eight hundred fifteen million, eighty-four thousand, eighty-seven".
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