165501050111 has 4 divisors (see below), whose sum is σ = 165598577472. Its totient is φ = 165403522752.

The previous prime is 165501050101. The next prime is 165501050179. The reversal of 165501050111 is 111050105561.

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 165501050111 - 2²² = 165496855807 is a prime.

It is a super-2 number, since 2×165501050111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165501050101) 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, 48761135 + ... + 48764528.

It is an arithmetic number, because the mean of its divisors is an integer number (41399644368).

Almost surely, 2^165501050111 is an apocalyptic number.

165501050111 is a deficient number, since it is larger than the sum of its proper divisors (97527361).

165501050111 is an equidigital number, since it uses as much as digits as its factorization.

165501050111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97527360.

The product of its (nonzero) digits is 750, while the sum is 26.

Adding to 165501050111 its reverse (111050105561), we get a palindrome (276551155672).

The spelling of 165501050111 in words is "one hundred sixty-five billion, five hundred one million, fifty thousand, one hundred eleven".