12643151705 has 16 divisors (see below), whose sum is σ = 15372564480. Its totient is φ = 9980812608.

The previous prime is 12643151701. The next prime is 12643151737. The reversal of 12643151705 is 50715134621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12643151705 - 2² = 12643151701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12643151701) 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, 771224 + ... + 787446.

It is an arithmetic number, because the mean of its divisors is an integer number (960785280).

Almost surely, 2^12643151705 is an apocalyptic number.

It is an amenable number.

12643151705 is a deficient number, since it is larger than the sum of its proper divisors (2729412775).

12643151705 is a wasteful number, since it uses less digits than its factorization.

12643151705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18280.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 12643151705 in words is "twelve billion, six hundred forty-three million, one hundred fifty-one thousand, seven hundred five".