12643844676 has 24 divisors (see below), whose sum is σ = 30519625920. Its totient is φ = 4069283232.

The previous prime is 12643844663. The next prime is 12643844677. The reversal of 12643844676 is 67644834621.

It is a super-4 number, since 4×12643844676⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (12643844677) 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, 18166096 + ... + 18166791.

It is an arithmetic number, because the mean of its divisors is an integer number (1271651080).

Almost surely, 2^12643844676 is an apocalyptic number.

It is an amenable number.

12643844676 is an abundant number, since it is smaller than the sum of its proper divisors (17875781244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12643844676 is a wasteful number, since it uses less digits than its factorization.

12643844676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36332923 (or 36332921 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 51.

The spelling of 12643844676 in words is "twelve billion, six hundred forty-three million, eight hundred forty-four thousand, six hundred seventy-six".