12078684178 has 32 divisors (see below), whose sum is σ = 20981825280. Its totient is φ = 5154005760.

The previous prime is 12078684139. The next prime is 12078684187. The reversal of 12078684178 is 87148687021.

It is a super-2 number, since 2×12078684178² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103975 + ... + 186997.

It is an arithmetic number, because the mean of its divisors is an integer number (655682040).

Almost surely, 2^12078684178 is an apocalyptic number.

12078684178 is a deficient number, since it is larger than the sum of its proper divisors (8903141102).

12078684178 is a wasteful number, since it uses less digits than its factorization.

12078684178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83442.

The product of its (nonzero) digits is 1204224, while the sum is 52.

The spelling of 12078684178 in words is "twelve billion, seventy-eight million, six hundred eighty-four thousand, one hundred seventy-eight".