12218174946 has 40 divisors (see below), whose sum is σ = 27620084844. Its totient is φ = 4036677120.

The previous prime is 12218174939. The next prime is 12218174951. The reversal of 12218174946 is 64947181221.

It can be written as a sum of positive squares in 2 ways, for example, as 12065924025 + 152250921 = 109845^2 + 12339^2 .

It is a super-2 number, since 2×12218174946² (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 19 ways as a sum of consecutive naturals, for example, 315415 + ... + 352026.

Almost surely, 2^12218174946 is an apocalyptic number.

12218174946 is an abundant number, since it is smaller than the sum of its proper divisors (15401909898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12218174946 is a wasteful number, since it uses less digits than its factorization.

12218174946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667568 (or 667559 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 12218174946 in words is "twelve billion, two hundred eighteen million, one hundred seventy-four thousand, nine hundred forty-six".