12646738188 has 72 divisors (see below), whose sum is σ = 36547344288. Its totient is φ = 3612135168.

The previous prime is 12646738171. The next prime is 12646738193. The reversal of 12646738188 is 88183764621.

12646738188 is a `hidden beast` number, since 1 + 26 + 467 + 3 + 81 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 959370 + ... + 972462.

It is an arithmetic number, because the mean of its divisors is an integer number (507602004).

Almost surely, 2^12646738188 is an apocalyptic number.

12646738188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12646738188 is an abundant number, since it is smaller than the sum of its proper divisors (23900606100).

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

12646738188 is a wasteful number, since it uses less digits than its factorization.

12646738188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16943 (or 16938 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 12646738188 in words is "twelve billion, six hundred forty-six million, seven hundred thirty-eight thousand, one hundred eighty-eight".