1728025020165 has 16 divisors (see below), whose sum is σ = 2764968264000. Its totient is φ = 921570600192.

The previous prime is 1728025020133. The next prime is 1728025020167. The reversal of 1728025020165 is 5610205208271.

It is not a de Polignac number, because 1728025020165 - 2⁵ = 1728025020133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728025020167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2335935 + ... + 2985404.

It is an arithmetic number, because the mean of its divisors is an integer number (172810516500).

Almost surely, 2^{1728025020165} is an apocalyptic number.

1728025020165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1728025020165 is a deficient number, since it is larger than the sum of its proper divisors (1036943243835).

1728025020165 is a wasteful number, since it uses less digits than its factorization.

1728025020165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5342996.

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 1728025020165 in words is "one trillion, seven hundred twenty-eight billion, twenty-five million, twenty thousand, one hundred sixty-five".