1681804875312 has 100 divisors (see below), whose sum is σ = 4867910123296. Its totient is φ = 560569507200.

The previous prime is 1681804875293. The next prime is 1681804875329. The reversal of 1681804875312 is 2135784081861.

1681804875312 is a `hidden beast` number, since 1 + 6 + 81 + 80 + 487 + 5 + 3 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 19 ways as a sum of consecutive naturals, for example, 36260937 + ... + 36307287.

Almost surely, 2^{1681804875312} is an apocalyptic number.

1681804875312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1681804875312 is an abundant number, since it is smaller than the sum of its proper divisors (3186105247984).

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

1681804875312 is a wasteful number, since it uses less digits than its factorization.

1681804875312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74368 (or 74353 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 1681804875312 in words is "one trillion, six hundred eighty-one billion, eight hundred four million, eight hundred seventy-five thousand, three hundred twelve".