12180616128 has 42 divisors (see below), whose sum is σ = 34913538504. Its totient is φ = 4060205184.

The previous prime is 12180616111. The next prime is 12180616199. The reversal of 12180616128 is 82161608121.

12180616128 is a `hidden beast` number, since 1 + 2 + 18 + 0 + 616 + 1 + 28 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 12180616092 and 12180616101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10572876 + ... + 10574027.

Almost surely, 2^12180616128 is an apocalyptic number.

12180616128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12180616128 is an abundant number, since it is smaller than the sum of its proper divisors (22732922376).

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

12180616128 is a wasteful number, since it uses less digits than its factorization.

12180616128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21146921 (or 21146908 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 12180616128 in words is "twelve billion, one hundred eighty million, six hundred sixteen thousand, one hundred twenty-eight".