12178228128 has 192 divisors, whose sum is σ = 35409830400. Its totient is φ = 3634191360.

The previous prime is 12178228123. The next prime is 12178228141. The reversal of 12178228128 is 82182287121.

It is a super-2 number, since 2×12178228128² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12178228128.

It is not an unprimeable number, because it can be changed into a prime (12178228123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23925538 + ... + 23926046.

It is an arithmetic number, because the mean of its divisors is an integer number (184426200).

Almost surely, 2^12178228128 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 12178228128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17704915200).

12178228128 is an abundant number, since it is smaller than the sum of its proper divisors (23231602272).

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

12178228128 is a wasteful number, since it uses less digits than its factorization.

12178228128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 827 counting only the distinct ones).

The product of its digits is 57344, while the sum is 42.

The spelling of 12178228128 in words is "twelve billion, one hundred seventy-eight million, two hundred twenty-eight thousand, one hundred twenty-eight".