1728731443001 has 16 divisors (see below), whose sum is σ = 1808204428800. Its totient is φ = 1650622008000.

The previous prime is 1728731442953. The next prime is 1728731443009. The reversal of 1728731443001 is 1003441378271.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1728731443001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1728731443001.

It is not an unprimeable number, because it can be changed into a prime (1728731443009) 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 15 ways as a sum of consecutive naturals, for example, 2105696 + ... + 2809166.

It is an arithmetic number, because the mean of its divisors is an integer number (113012776800).

Almost surely, 2^{1728731443001} is an apocalyptic number.

It is an amenable number.

1728731443001 is a deficient number, since it is larger than the sum of its proper divisors (79472985799).

1728731443001 is a wasteful number, since it uses less digits than its factorization.

1728731443001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704440.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 1728731443001 in words is "one trillion, seven hundred twenty-eight billion, seven hundred thirty-one million, four hundred forty-three thousand, one".