3281728489861 has 8 divisors (see below), whose sum is σ = 3300966056000. Its totient is φ = 3262518388800.

The previous prime is 3281728489829. The next prime is 3281728489877. The reversal of 3281728489861 is 1689848271823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3281728489861 - 2⁵ = 3281728489829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281728489801) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6626571 + ... + 7104568.

It is an arithmetic number, because the mean of its divisors is an integer number (412620757000).

Almost surely, 2^{3281728489861} is an apocalyptic number.

It is an amenable number.

3281728489861 is a deficient number, since it is larger than the sum of its proper divisors (19237566139).

3281728489861 is a wasteful number, since it uses less digits than its factorization.

3281728489861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13732539.

The product of its digits is 74317824, while the sum is 67.

The spelling of 3281728489861 in words is "three trillion, two hundred eighty-one billion, seven hundred twenty-eight million, four hundred eighty-nine thousand, eight hundred sixty-one".