164733865 has 4 divisors (see below), whose sum is σ = 197680644. Its totient is φ = 131787088.

The previous prime is 164733853. The next prime is 164733923. The reversal of 164733865 is 568337461.

164733865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88887184 + 75846681 = 9428^2 + 8709^2 .

It is a cyclic number.

It is not a de Polignac number, because 164733865 - 2⁹ = 164733353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16473382 + ... + 16473391.

It is an arithmetic number, because the mean of its divisors is an integer number (49420161).

Almost surely, 2^164733865 is an apocalyptic number.

It is an amenable number.

164733865 is a deficient number, since it is larger than the sum of its proper divisors (32946779).

164733865 is an equidigital number, since it uses as much as digits as its factorization.

164733865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32946778.

The product of its digits is 362880, while the sum is 43.

The square root of 164733865 is about 12834.8691072406. The cubic root of 164733865 is about 548.1856078700.

The spelling of 164733865 in words is "one hundred sixty-four million, seven hundred thirty-three thousand, eight hundred sixty-five".