12643801186 has 8 divisors (see below), whose sum is σ = 18966479724. Its totient is φ = 6321641280.

The previous prime is 12643801171. The next prime is 12643801189. The reversal of 12643801186 is 68110834621.

It can be written as a sum of positive squares in 2 ways, for example, as 12039575625 + 604225561 = 109725^2 + 24581^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12643801189) 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, 61555 + ... + 170518.

Almost surely, 2^12643801186 is an apocalyptic number.

12643801186 is a deficient number, since it is larger than the sum of its proper divisors (6322678538).

12643801186 is a wasteful number, since it uses less digits than its factorization.

12643801186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259316.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 12643801186 in words is "twelve billion, six hundred forty-three million, eight hundred one thousand, one hundred eighty-six".