12918378997128 has 32 divisors (see below), whose sum is σ = 35231942720160. Its totient is φ = 3914660302080.

The previous prime is 12918378997057. The next prime is 12918378997171. The reversal of 12918378997128 is 82179987381921.

It is a self number, because there is not a number n which added to its sum of digits gives 12918378997128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24466626625 + ... + 24466627152.

It is an arithmetic number, because the mean of its divisors is an integer number (1100998210005).

Almost surely, 2^{12918378997128} is an apocalyptic number.

It is an amenable number.

12918378997128 is an abundant number, since it is smaller than the sum of its proper divisors (22313563723032).

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

12918378997128 is a wasteful number, since it uses less digits than its factorization.

12918378997128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48933253797 (or 48933253793 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 75.

The spelling of 12918378997128 in words is "twelve trillion, nine hundred eighteen billion, three hundred seventy-eight million, nine hundred ninety-seven thousand, one hundred twenty-eight".