165211071169 has 8 divisors (see below), whose sum is σ = 166163494952. Its totient is φ = 164259083520.

The previous prime is 165211071167. The next prime is 165211071187. The reversal of 165211071169 is 961170112561.

It is a happy number.

165211071169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14269497025 + 150941574144 = 119455^2 + 388512^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165211071169 - 2¹ = 165211071167 is a prime.

It is a super-2 number, since 2×165211071169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165211071167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666607 + ... + 880219.

It is an arithmetic number, because the mean of its divisors is an integer number (20770436869).

Almost surely, 2^165211071169 is an apocalyptic number.

It is an amenable number.

165211071169 is a deficient number, since it is larger than the sum of its proper divisors (952423783).

165211071169 is a wasteful number, since it uses less digits than its factorization.

165211071169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218067.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 165211071169 in words is "one hundred sixty-five billion, two hundred eleven million, seventy-one thousand, one hundred sixty-nine".