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12643159519 = 199321412963
BaseRepresentation
bin10111100011001011…
…10100110111011111
31012122010100001100101
423301211310313133
5201343122101034
65450322441531
7625211040244
oct136145646737
935563301311
1012643159519
1153a8808971
12254a2032a7
1312664920a3
1487d1db5cb
154dee66514
hex2f1974ddf

12643159519 has 8 divisors (see below), whose sum is σ = 12659682672. Its totient is φ = 12626650560.

The previous prime is 12643159411. The next prime is 12643159523. The reversal of 12643159519 is 91595134621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12643159519 - 215 = 12643126751 is a prime.

It is a super-2 number, since 2×126431595192 (a number of 21 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 (12643159219) 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, 4265532 + ... + 4268494.

It is an arithmetic number, because the mean of its divisors is an integer number (1582460334).

Almost surely, 212643159519 is an apocalyptic number.

12643159519 is a deficient number, since it is larger than the sum of its proper divisors (16523153).

12643159519 is a wasteful number, since it uses less digits than its factorization.

12643159519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097.

The product of its digits is 291600, while the sum is 46.

The spelling of 12643159519 in words is "twelve billion, six hundred forty-three million, one hundred fifty-nine thousand, five hundred nineteen".

Divisors: 1 1993 2141 2963 4267013 5905259 6343783 12643159519