12432166656 has 144 divisors (see below), whose sum is σ = 40723544064. Its totient is φ = 3278794752.

The previous prime is 12432166639. The next prime is 12432166667. The reversal of 12432166656 is 65666123421.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19056 + ... + 158831.

Almost surely, 2^12432166656 is an apocalyptic number.

12432166656 is a gapful number since it is divisible by the number (16) 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 12432166656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20361772032).

12432166656 is an abundant number, since it is smaller than the sum of its proper divisors (28291377408).

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

12432166656 is a wasteful number, since it uses less digits than its factorization.

12432166656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177926 (or 177912 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The spelling of 12432166656 in words is "twelve billion, four hundred thirty-two million, one hundred sixty-six thousand, six hundred fifty-six".