1918238843118 has 64 divisors (see below), whose sum is σ = 4136227909632. Its totient is φ = 589565433600.

The previous prime is 1918238843077. The next prime is 1918238843137. The reversal of 1918238843118 is 8113488328191.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361724455 + ... + 361729757.

It is an arithmetic number, because the mean of its divisors is an integer number (64628561088).

Almost surely, 2^{1918238843118} is an apocalyptic number.

1918238843118 is an abundant number, since it is smaller than the sum of its proper divisors (2217989066514).

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

1918238843118 is a wasteful number, since it uses less digits than its factorization.

1918238843118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9649.

The product of its digits is 2654208, while the sum is 57.

The spelling of 1918238843118 in words is "one trillion, nine hundred eighteen billion, two hundred thirty-eight million, eight hundred forty-three thousand, one hundred eighteen".