12178257418 has 4 divisors (see below), whose sum is σ = 18267386130. Its totient is φ = 6089128708.

The previous prime is 12178257409. The next prime is 12178257431. The reversal of 12178257418 is 81475287121.

12178257418 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81475287121 = 281 ⋅289947641.

It can be written as a sum of positive squares in only one way, i.e., 12175577649 + 2679769 = 110343^2 + 1637^2 .

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 as a sum of consecutive naturals, namely, 3044564353 + ... + 3044564356.

Almost surely, 2^12178257418 is an apocalyptic number.

12178257418 is a deficient number, since it is larger than the sum of its proper divisors (6089128712).

12178257418 is an equidigital number, since it uses as much as digits as its factorization.

12178257418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089128711.

The product of its digits is 250880, while the sum is 46.

The spelling of 12178257418 in words is "twelve billion, one hundred seventy-eight million, two hundred fifty-seven thousand, four hundred eighteen".