165005404 has 48 divisors (see below), whose sum is σ = 310302720. Its totient is φ = 76602240.

The previous prime is 165005387. The next prime is 165005479. The reversal of 165005404 is 404500561.

165005404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530409 + ... + 530719.

It is an arithmetic number, because the mean of its divisors is an integer number (6464640).

Almost surely, 2^165005404 is an apocalyptic number.

It is an amenable number.

165005404 is a deficient number, since it is larger than the sum of its proper divisors (145297316).

165005404 is a wasteful number, since it uses less digits than its factorization.

165005404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 165005404 is about 12845.4429273575. The cubic root of 165005404 is about 548.4866430354.

Adding to 165005404 its reverse (404500561), we get a palindrome (569505965).

It can be divided in two parts, 16500 and 5404, that added together give a square (21904 = 148²).

The spelling of 165005404 in words is "one hundred sixty-five million, five thousand, four hundred four".