12171236616 has 576 divisors, whose sum is σ = 44115701760. Its totient is φ = 2993760000.

The previous prime is 12171236603. The next prime is 12171236621. The reversal of 12171236616 is 61663217121.

12171236616 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 1 + 2 + 36 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 80604141 + ... + 80604291.

It is an arithmetic number, because the mean of its divisors is an integer number (76589760).

Almost surely, 2^12171236616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12171236616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22057850880).

12171236616 is an abundant number, since it is smaller than the sum of its proper divisors (31944465144).

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

12171236616 is a wasteful number, since it uses less digits than its factorization.

12171236616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 272 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The spelling of 12171236616 in words is "twelve billion, one hundred seventy-one million, two hundred thirty-six thousand, six hundred sixteen".