165040045211 has 4 divisors (see below), whose sum is σ = 173726363400. Its totient is φ = 156353727024.

The previous prime is 165040045187. The next prime is 165040045253. The reversal of 165040045211 is 112540040561.

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

It is a cyclic number.

It is not a de Polignac number, because 165040045211 - 2²² = 165035850907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165040045271) 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, 4343159066 + ... + 4343159103.

It is an arithmetic number, because the mean of its divisors is an integer number (43431590850).

Almost surely, 2^165040045211 is an apocalyptic number.

165040045211 is a deficient number, since it is larger than the sum of its proper divisors (8686318189).

165040045211 is an equidigital number, since it uses as much as digits as its factorization.

165040045211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8686318188.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 165040045211 its reverse (112540040561), we get a palindrome (277580085772).

The spelling of 165040045211 in words is "one hundred sixty-five billion, forty million, forty-five thousand, two hundred eleven".