Base | Representation |
---|---|
bin | 10111111001011111… |
… | …00010111000101111 |
3 | 1020010011101120102010 |
4 | 23330233202320233 |
5 | 202234021203222 |
6 | 5521044532303 |
7 | 632642245113 |
oct | 137457427057 |
9 | 36104346363 |
10 | 12830256687 |
11 | 5494388826 |
12 | 25a09b1093 |
13 | 129617c481 |
14 | 899dc1743 |
15 | 5015c280c |
hex | 2fcbe2e2f |
12830256687 has 16 divisors (see below), whose sum is σ = 17307136512. Its totient is φ = 8453813760.
The previous prime is 12830256671. The next prime is 12830256707. The reversal of 12830256687 is 78665203821.
It is not a de Polignac number, because 12830256687 - 24 = 12830256671 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12830256487) 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, 91983 + ... + 184719.
It is an arithmetic number, because the mean of its divisors is an integer number (1081696032).
Almost surely, 212830256687 is an apocalyptic number.
12830256687 is a deficient number, since it is larger than the sum of its proper divisors (4476879825).
12830256687 is a wasteful number, since it uses less digits than its factorization.
12830256687 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 93278.
The product of its (nonzero) digits is 967680, while the sum is 48.
The spelling of 12830256687 in words is "twelve billion, eight hundred thirty million, two hundred fifty-six thousand, six hundred eighty-seven".
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