12643615326 has 64 divisors (see below), whose sum is σ = 26999092800. Its totient is φ = 3947194368.

The previous prime is 12643615291. The next prime is 12643615333. The reversal of 12643615326 is 62351634621.

It is a super-2 number, since 2×12643615326² (a number of 21 digits) contains 22 as substring.

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, 6749526 + ... + 6751398.

It is an arithmetic number, because the mean of its divisors is an integer number (421860825).

Almost surely, 2^12643615326 is an apocalyptic number.

12643615326 is an abundant number, since it is smaller than the sum of its proper divisors (14355477474).

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

12643615326 is a wasteful number, since it uses less digits than its factorization.

12643615326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2124 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The spelling of 12643615326 in words is "twelve billion, six hundred forty-three million, six hundred fifteen thousand, three hundred twenty-six".