1817385000000 has 448 divisors, whose sum is σ = 6365064955392. Its totient is φ = 456064000000.

The previous prime is 1817384999999. The next prime is 1817385000019. The reversal of 1817385000000 is 5837181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 254996437 + ... + 255003563.

Almost surely, 2^{1817385000000} is an apocalyptic number.

1817385000000 is a gapful number since it is divisible by the number (10) 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 1817385000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3182532477696).

1817385000000 is an abundant number, since it is smaller than the sum of its proper divisors (4547679955392).

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

1817385000000 is an frugal number, since it uses more digits than its factorization.

1817385000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7194 (or 7154 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The spelling of 1817385000000 in words is "one trillion, eight hundred seventeen billion, three hundred eighty-five million", and thus it is an aban number.