165305404404 has 36 divisors (see below), whose sum is σ = 477548946784. Its totient is φ = 47230115472.

The previous prime is 165305404403. The next prime is 165305404409. The reversal of 165305404404 is 404404503561.

165305404404 is a `hidden beast` number, since 165 + 3 + 0 + 54 + 0 + 440 + 4 = 666.

165305404404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165305404403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 327986662 + ... + 327987165.

Almost surely, 2^165305404404 is an apocalyptic number.

165305404404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

165305404404 is an abundant number, since it is smaller than the sum of its proper divisors (312243542380).

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

165305404404 is a wasteful number, since it uses less digits than its factorization.

165305404404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655973844 (or 655973839 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 165305404404 its reverse (404404503561), we get a palindrome (569709907965).

The spelling of 165305404404 in words is "one hundred sixty-five billion, three hundred five million, four hundred four thousand, four hundred four".