12255778178 has 24 divisors (see below), whose sum is σ = 21478506300. Its totient is φ = 5229530208.

The previous prime is 12255778153. The next prime is 12255778231. The reversal of 12255778178 is 87187755221.

It can be written as a sum of positive squares in 2 ways, for example, as 12091861369 + 163916809 = 109963^2 + 12803^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250613 + ... + 295496.

Almost surely, 2^12255778178 is an apocalyptic number.

12255778178 is a deficient number, since it is larger than the sum of its proper divisors (9222728122).

12255778178 is a wasteful number, since it uses less digits than its factorization.

12255778178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546354 (or 546347 counting only the distinct ones).

The product of its digits is 2195200, while the sum is 53.

The spelling of 12255778178 in words is "twelve billion, two hundred fifty-five million, seven hundred seventy-eight thousand, one hundred seventy-eight".