12226778918 has 8 divisors (see below), whose sum is σ = 18418882248. Its totient is φ = 6087151504.

The previous prime is 12226778911. The next prime is 12226778923. The reversal of 12226778918 is 81987762221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12226778918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12226778911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13118396 + ... + 13119327.

It is an arithmetic number, because the mean of its divisors is an integer number (2302360281).

Almost surely, 2^12226778918 is an apocalyptic number.

12226778918 is a deficient number, since it is larger than the sum of its proper divisors (6192103330).

12226778918 is a wasteful number, since it uses less digits than its factorization.

12226778918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26237958.

The product of its digits is 1354752, while the sum is 53.

The spelling of 12226778918 in words is "twelve billion, two hundred twenty-six million, seven hundred seventy-eight thousand, nine hundred eighteen".