1728968335789 has 4 divisors (see below), whose sum is σ = 1728977037120. Its totient is φ = 1728959634460.

The previous prime is 1728968335723. The next prime is 1728968335811. The reversal of 1728968335789 is 9875338698271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1728968335789 - 2³⁹ = 1179212521901 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 (1728968335709) 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 3 ways as a sum of consecutive naturals, for example, 4045477 + ... + 4452394.

It is an arithmetic number, because the mean of its divisors is an integer number (432244259280).

Almost surely, 2^{1728968335789} is an apocalyptic number.

It is an amenable number.

1728968335789 is a deficient number, since it is larger than the sum of its proper divisors (8701331).

1728968335789 is an equidigital number, since it uses as much as digits as its factorization.

1728968335789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8701330.

The product of its digits is 1097349120, while the sum is 76.

The spelling of 1728968335789 in words is "one trillion, seven hundred twenty-eight billion, nine hundred sixty-eight million, three hundred thirty-five thousand, seven hundred eighty-nine".