12256456178 has 6 divisors (see below), whose sum is σ = 18384919119. Its totient is φ = 6128149806.

The previous prime is 12256456169. The next prime is 12256456189. The reversal of 12256456178 is 87165465221.

It can be written as a sum of positive squares in only one way, i.e., 6128228089 + 6128228089 = 78283^2 + 78283^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78283.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 117425 + ... + 195707.

Almost surely, 2^12256456178 is an apocalyptic number.

12256456178 is a deficient number, since it is larger than the sum of its proper divisors (6128462941).

12256456178 is an frugal number, since it uses more digits than its factorization.

12256456178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156568 (or 78285 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The spelling of 12256456178 in words is "twelve billion, two hundred fifty-six million, four hundred fifty-six thousand, one hundred seventy-eight".