12178199155 has 12 divisors (see below), whose sum is σ = 14694466176. Its totient is φ = 9688837200.

The previous prime is 12178199083. The next prime is 12178199167. The reversal of 12178199155 is 55199187121.

12178199155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12178199155 - 2²⁷ = 12043981427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12178199099 and 12178199108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3408520 + ... + 3412090.

It is an arithmetic number, because the mean of its divisors is an integer number (1224538848).

Almost surely, 2^12178199155 is an apocalyptic number.

12178199155 is a deficient number, since it is larger than the sum of its proper divisors (2516267021).

12178199155 is an frugal number, since it uses more digits than its factorization.

12178199155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338 (or 3767 counting only the distinct ones).

The product of its digits is 226800, while the sum is 49.

The spelling of 12178199155 in words is "twelve billion, one hundred seventy-eight million, one hundred ninety-nine thousand, one hundred fifty-five".