165161600111 has 8 divisors (see below), whose sum is σ = 165676602000. Its totient is φ = 164646865152.

The previous prime is 165161600101. The next prime is 165161600113. The reversal of 165161600111 is 111006161561.

It is a happy number.

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 165161600111 - 2²² = 165157405807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165161600113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210640 + ... + 1340138.

It is an arithmetic number, because the mean of its divisors is an integer number (20709575250).

Almost surely, 2^165161600111 is an apocalyptic number.

165161600111 is a deficient number, since it is larger than the sum of its proper divisors (515001889).

165161600111 is a wasteful number, since it uses less digits than its factorization.

165161600111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133465.

The product of its (nonzero) digits is 1080, while the sum is 29.

Adding to 165161600111 its reverse (111006161561), we get a palindrome (276167761672).

The spelling of 165161600111 in words is "one hundred sixty-five billion, one hundred sixty-one million, six hundred thousand, one hundred eleven".