12156768178 has 4 divisors (see below), whose sum is σ = 18235152270. Its totient is φ = 6078384088.

The previous prime is 12156768163. The next prime is 12156768193. The reversal of 12156768178 is 87186765121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12156768163) and next prime (12156768193).

It can be written as a sum of positive squares in only one way, i.e., 9785759929 + 2371008249 = 98923^2 + 48693^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3039192043 + ... + 3039192046.

Almost surely, 2^12156768178 is an apocalyptic number.

12156768178 is a deficient number, since it is larger than the sum of its proper divisors (6078384092).

12156768178 is an equidigital number, since it uses as much as digits as its factorization.

12156768178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078384091.

The product of its digits is 1128960, while the sum is 52.

The spelling of 12156768178 in words is "twelve billion, one hundred fifty-six million, seven hundred sixty-eight thousand, one hundred seventy-eight".