165404915 has 8 divisors (see below), whose sum is σ = 213754128. Its totient is φ = 122145120.

The previous prime is 165404909. The next prime is 165404957. The reversal of 165404915 is 519404561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165404915 - 2¹⁰ = 165403891 is a prime.

It is a super-3 number, since 3×165404915³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272281 + ... + 1272410.

It is an arithmetic number, because the mean of its divisors is an integer number (26719266).

Almost surely, 2^165404915 is an apocalyptic number.

165404915 is a deficient number, since it is larger than the sum of its proper divisors (48349213).

165404915 is a wasteful number, since it uses less digits than its factorization.

165404915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544709.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 165404915 is about 12860.9842158367. The cubic root of 165404915 is about 548.9289514484.

The spelling of 165404915 in words is "one hundred sixty-five million, four hundred four thousand, nine hundred fifteen".