1728731715728 has 10 divisors (see below), whose sum is σ = 3349417699254. Its totient is φ = 864365857856.

The previous prime is 1728731715703. The next prime is 1728731715787. The reversal of 1728731715728 is 8275171378271.

It can be written as a sum of positive squares in only one way, i.e., 1728036444304 + 695271424 = 1314548^2 + 26368^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54022866101 + ... + 54022866132.

Almost surely, 2^{1728731715728} is an apocalyptic number.

It is an amenable number.

1728731715728 is a deficient number, since it is larger than the sum of its proper divisors (1620685983526).

1728731715728 is a wasteful number, since it uses less digits than its factorization.

1728731715728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108045732241 (or 108045732235 counting only the distinct ones).

The product of its digits is 9219840, while the sum is 59.

The spelling of 1728731715728 in words is "one trillion, seven hundred twenty-eight billion, seven hundred thirty-one million, seven hundred fifteen thousand, seven hundred twenty-eight".