1728068515357 has 4 divisors (see below), whose sum is σ = 1728176488416. Its totient is φ = 1727960542300.

The previous prime is 1728068515351. The next prime is 1728068515373. The reversal of 1728068515357 is 7535158608271.

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 1728068515357 - 2³⁹ = 1178312701469 is a prime.

It is a super-2 number, since 2×1728068515357² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728068515351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53962519 + ... + 53994532.

It is an arithmetic number, because the mean of its divisors is an integer number (432044122104).

Almost surely, 2^{1728068515357} is an apocalyptic number.

It is an amenable number.

1728068515357 is a deficient number, since it is larger than the sum of its proper divisors (107973059).

1728068515357 is a wasteful number, since it uses less digits than its factorization.

1728068515357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107973058.

The product of its (nonzero) digits is 14112000, while the sum is 58.

The spelling of 1728068515357 in words is "one trillion, seven hundred twenty-eight billion, sixty-eight million, five hundred fifteen thousand, three hundred fifty-seven".