1705640000165 has 4 divisors (see below), whose sum is σ = 2046768000204. Its totient is φ = 1364512000128.

The previous prime is 1705640000153. The next prime is 1705640000173. The reversal of 1705640000165 is 5610000465071.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 407576265889 + 1298063734276 = 638417^2 + 1139326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1705640000165 - 2⁴ = 1705640000149 is a prime.

It is a super-2 number, since 2×1705640000165² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 170564000012 + ... + 170564000021.

It is an arithmetic number, because the mean of its divisors is an integer number (511692000051).

Almost surely, 2^{1705640000165} is an apocalyptic number.

It is an amenable number.

1705640000165 is a deficient number, since it is larger than the sum of its proper divisors (341128000039).

1705640000165 is an equidigital number, since it uses as much as digits as its factorization.

1705640000165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341128000038.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 1705640000165 in words is "one trillion, seven hundred five billion, six hundred forty million, one hundred sixty-five", and thus it is an aban number.