264161165 has 4 divisors (see below), whose sum is σ = 316993404. Its totient is φ = 211328928.

The previous prime is 264161111. The next prime is 264161201. The reversal of 264161165 is 561161462.

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 95628841 + 168532324 = 9779^2 + 12982^2 .

It is a cyclic number.

It is not a de Polignac number, because 264161165 - 2¹⁸ = 263899021 is a prime.

It is a super-2 number, since 2×264161165² = 139562242188314450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26416112 + ... + 26416121.

It is an arithmetic number, because the mean of its divisors is an integer number (79248351).

Almost surely, 2^264161165 is an apocalyptic number.

It is an amenable number.

264161165 is a deficient number, since it is larger than the sum of its proper divisors (52832239).

264161165 is an equidigital number, since it uses as much as digits as its factorization.

264161165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52832238.

The product of its digits is 8640, while the sum is 32.

The square root of 264161165 is about 16253.0355626264. The cubic root of 264161165 is about 641.6373804216.

The spelling of 264161165 in words is "two hundred sixty-four million, one hundred sixty-one thousand, one hundred sixty-five".