1681839109512 has 96 divisors (see below), whose sum is σ = 4783298345280. Its totient is φ = 532822942080.

The previous prime is 1681839109493. The next prime is 1681839109543. The reversal of 1681839109512 is 2159019381861.

It is a happy number.

1681839109512 is a `hidden beast` number, since 1 + 6 + 8 + 18 + 3 + 9 + 109 + 512 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2974414 + ... + 3494397.

It is an arithmetic number, because the mean of its divisors is an integer number (49826024430).

Almost surely, 2^{1681839109512} is an apocalyptic number.

1681839109512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1681839109512 is an abundant number, since it is smaller than the sum of its proper divisors (3101459235768).

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

1681839109512 is a wasteful number, since it uses less digits than its factorization.

1681839109512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6469003 (or 6468996 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 1681839109512 in words is "one trillion, six hundred eighty-one billion, eight hundred thirty-nine million, one hundred nine thousand, five hundred twelve".