12311228478178 has 16 divisors (see below), whose sum is σ = 21105164925504. Its totient is φ = 5276190321360.

The previous prime is 12311228478149. The next prime is 12311228478209. The reversal of 12311228478178 is 87187482211321.

It is a happy number.

It is a super-3 number, since 3×12311228478178³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668933 + ... + 5634328.

It is an arithmetic number, because the mean of its divisors is an integer number (1319072807844).

Almost surely, 2^{12311228478178} is an apocalyptic number.

12311228478178 is a deficient number, since it is larger than the sum of its proper divisors (8793936447326).

12311228478178 is a wasteful number, since it uses less digits than its factorization.

12311228478178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409177.

The product of its digits is 2408448, while the sum is 55.

The spelling of 12311228478178 in words is "twelve trillion, three hundred eleven billion, two hundred twenty-eight million, four hundred seventy-eight thousand, one hundred seventy-eight".