12644849129796 has 432 divisors, whose sum is σ = 36450651269760. Its totient is φ = 3830733803520.

The previous prime is 12644849129777. The next prime is 12644849129797. The reversal of 12644849129796 is 69792194844621.

12644849129796 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 48 + 491 + 2 + 9 + 7 + 96 = 666.

It is not an unprimeable number, because it can be changed into a prime (12644849129797) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3062446260 + ... + 3062450388.

Almost surely, 2^{12644849129796} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12644849129796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18225325634880).

12644849129796 is an abundant number, since it is smaller than the sum of its proper divisors (23805802139964).

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

12644849129796 is a wasteful number, since it uses less digits than its factorization.

12644849129796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458 (or 4431 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 72.

The spelling of 12644849129796 in words is "twelve trillion, six hundred forty-four billion, eight hundred forty-nine million, one hundred twenty-nine thousand, seven hundred ninety-six".