165405363 has 8 divisors (see below), whose sum is σ = 223646976. Its totient is φ = 108717000.

The previous prime is 165405353. The next prime is 165405403. The reversal of 165405363 is 363504561.

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

It is not a de Polignac number, because 165405363 - 2¹² = 165401267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165405313) by changing a digit.

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, 388063 + ... + 388488.

It is an arithmetic number, because the mean of its divisors is an integer number (27955872).

Almost surely, 2^165405363 is an apocalyptic number.

165405363 is a deficient number, since it is larger than the sum of its proper divisors (58241613).

165405363 is an equidigital number, since it uses as much as digits as its factorization.

165405363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776625.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 165405363 is about 12861.0016328434. The cubic root of 165405363 is about 548.9294470402.

The spelling of 165405363 in words is "one hundred sixty-five million, four hundred five thousand, three hundred sixty-three".