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12643159517 = 26947000593
BaseRepresentation
bin10111100011001011…
…10100110111011101
31012122010100001100022
423301211310313131
5201343122101032
65450322441525
7625211040242
oct136145646735
935563301308
1012643159517
1153a880896a
12254a2032a5
1312664920a1
1487d1db5c9
154dee66512
hex2f1974ddd

12643159517 has 4 divisors (see below), whose sum is σ = 12690160380. Its totient is φ = 12596158656.

The previous prime is 12643159411. The next prime is 12643159523. The reversal of 12643159517 is 71595134621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4739771716 + 7903387801 = 68846^2 + 88901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12643159517 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 (12643159537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23500028 + ... + 23500565.

It is an arithmetic number, because the mean of its divisors is an integer number (3172540095).

Almost surely, 212643159517 is an apocalyptic number.

It is an amenable number.

12643159517 is a deficient number, since it is larger than the sum of its proper divisors (47000863).

12643159517 is an equidigital number, since it uses as much as digits as its factorization.

12643159517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47000862.

The product of its digits is 226800, while the sum is 44.

The spelling of 12643159517 in words is "twelve billion, six hundred forty-three million, one hundred fifty-nine thousand, five hundred seventeen".

Divisors: 1 269 47000593 12643159517