12113635310644 has 72 divisors (see below), whose sum is σ = 25516338876000. Its totient is φ = 5011340741568.

The previous prime is 12113635310639. The next prime is 12113635310717. The reversal of 12113635310644 is 44601353631121.

It is a junction number, because it is equal to n+sod(n) for n = 12113635310597 and 12113635310606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23728227 + ... + 24233365.

It is an arithmetic number, because the mean of its divisors is an integer number (354393595500).

Almost surely, 2^{12113635310644} is an apocalyptic number.

12113635310644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12113635310644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12758169438000).

12113635310644 is an abundant number, since it is smaller than the sum of its proper divisors (13402703565356).

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

12113635310644 is a wasteful number, since it uses less digits than its factorization.

12113635310644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509405 (or 509396 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 12113635310644 its reverse (44601353631121), we get a palindrome (56714988941765).

The spelling of 12113635310644 in words is "twelve trillion, one hundred thirteen billion, six hundred thirty-five million, three hundred ten thousand, six hundred forty-four".