164903565 has 16 divisors (see below), whose sum is σ = 277732800. Its totient is φ = 83319552.

The previous prime is 164903521. The next prime is 164903579. The reversal of 164903565 is 565309461.

164903565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 164903565 - 2¹⁴ = 164887181 is a prime.

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, 289020 + ... + 289589.

It is an arithmetic number, because the mean of its divisors is an integer number (17358300).

Almost surely, 2^164903565 is an apocalyptic number.

164903565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164903565 is a deficient number, since it is larger than the sum of its proper divisors (112829235).

164903565 is a wasteful number, since it uses less digits than its factorization.

164903565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578636.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 164903565 is about 12841.4783027500. The cubic root of 164903565 is about 548.3737804154.

The spelling of 164903565 in words is "one hundred sixty-four million, nine hundred three thousand, five hundred sixty-five".