12118278164 has 12 divisors (see below), whose sum is σ = 22454456724. Its totient is φ = 5702719104.

The previous prime is 12118278149. The next prime is 12118278167. The reversal of 12118278164 is 46187281121.

It can be written as a sum of positive squares in 2 ways, for example, as 4498384900 + 7619893264 = 67070^2 + 87292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118278167) 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, 89104919 + ... + 89105054.

It is an arithmetic number, because the mean of its divisors is an integer number (1871204727).

Almost surely, 2^12118278164 is an apocalyptic number.

It is an amenable number.

12118278164 is a deficient number, since it is larger than the sum of its proper divisors (10336178560).

12118278164 is a wasteful number, since it uses less digits than its factorization.

12118278164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178209994 (or 178209992 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The spelling of 12118278164 in words is "twelve billion, one hundred eighteen million, two hundred seventy-eight thousand, one hundred sixty-four".