12653444166 has 64 divisors (see below), whose sum is σ = 28140569856. Its totient is φ = 3761049600.

The previous prime is 12653444147. The next prime is 12653444173. The reversal of 12653444166 is 66144435621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 714681 + ... + 732171.

It is an arithmetic number, because the mean of its divisors is an integer number (439696404).

Almost surely, 2^12653444166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12653444166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14070284928).

12653444166 is an abundant number, since it is smaller than the sum of its proper divisors (15487125690).

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

12653444166 is a wasteful number, since it uses less digits than its factorization.

12653444166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17717.

The product of its digits is 414720, while the sum is 42.

Adding to 12653444166 its reverse (66144435621), we get a palindrome (78797879787).

The spelling of 12653444166 in words is "twelve billion, six hundred fifty-three million, four hundred forty-four thousand, one hundred sixty-six".