165704350165 has 16 divisors (see below), whose sum is σ = 201931258608. Its totient is φ = 130512646656.

The previous prime is 165704350157. The next prime is 165704350171. The reversal of 165704350165 is 561053407561.

It can be written as a sum of positive squares in 8 ways, for example, as 17089956 + 165687260209 = 4134^2 + 407047^2 .

It is a cyclic number.

It is not a de Polignac number, because 165704350165 - 2³ = 165704350157 is a prime.

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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204222 + ... + 610831.

It is an arithmetic number, because the mean of its divisors is an integer number (12620703663).

Almost surely, 2^165704350165 is an apocalyptic number.

It is an amenable number.

165704350165 is a deficient number, since it is larger than the sum of its proper divisors (36226908443).

165704350165 is an equidigital number, since it uses as much as digits as its factorization.

165704350165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815688.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 165704350165 in words is "one hundred sixty-five billion, seven hundred four million, three hundred fifty thousand, one hundred sixty-five".