1817843673912 has 128 divisors (see below), whose sum is σ = 5301980928000. Its totient is φ = 519173687424.

The previous prime is 1817843673907. The next prime is 1817843673931. The reversal of 1817843673912 is 2193763487181.

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, 20890558 + ... + 20977394.

It is an arithmetic number, because the mean of its divisors is an integer number (41421726000).

Almost surely, 2^{1817843673912} is an apocalyptic number.

1817843673912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1817843673912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2650990464000).

1817843673912 is an abundant number, since it is smaller than the sum of its proper divisors (3484137254088).

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

1817843673912 is a wasteful number, since it uses less digits than its factorization.

1817843673912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89410 (or 89392 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The spelling of 1817843673912 in words is "one trillion, eight hundred seventeen billion, eight hundred forty-three million, six hundred seventy-three thousand, nine hundred twelve".