165401104 has 40 divisors (see below), whose sum is σ = 352164960. Its totient is φ = 74630400.

The previous prime is 165401083. The next prime is 165401113. The reversal of 165401104 is 401104561.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21084 + ... + 27844.

It is an arithmetic number, because the mean of its divisors is an integer number (8804124).

Almost surely, 2^165401104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165401104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176082480).

165401104 is an abundant number, since it is smaller than the sum of its proper divisors (186763856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165401104 is a wasteful number, since it uses less digits than its factorization.

165401104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6919 (or 6913 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 165401104 is about 12860.8360536942. The cubic root of 165401104 is about 548.9247355634.

Adding to 165401104 its reverse (401104561), we get a palindrome (566505665).

The spelling of 165401104 in words is "one hundred sixty-five million, four hundred one thousand, one hundred four".