12172836168 has 112 divisors (see below), whose sum is σ = 34542035280. Its totient is φ = 4019484384.

The previous prime is 12172836161. The next prime is 12172836173. The reversal of 12172836168 is 86163827121.

12172836168 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 28 + 3 + 616 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (12172836161) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 614271 + ... + 633777.

Almost surely, 2^12172836168 is an apocalyptic number.

12172836168 is a gapful number since it is divisible by the number (18) 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 12172836168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17271017640).

12172836168 is an abundant number, since it is smaller than the sum of its proper divisors (22369199112).

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

12172836168 is a wasteful number, since it uses less digits than its factorization.

12172836168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19638 (or 19619 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 12172836168 in words is "twelve billion, one hundred seventy-two million, eight hundred thirty-six thousand, one hundred sixty-eight".