4165504165 has 4 divisors (see below), whose sum is σ = 4998605004. Its totient is φ = 3332403328.

The previous prime is 4165504129. The next prime is 4165504181. The reversal of 4165504165 is 5614055614.

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 1954435681 + 2211068484 = 44209^2 + 47022^2 .

It is a cyclic number.

It is not a de Polignac number, because 4165504165 - 2²¹ = 4163407013 is a prime.

It is a Duffinian number.

It is a congruent 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, 416550412 + ... + 416550421.

It is an arithmetic number, because the mean of its divisors is an integer number (1249651251).

Almost surely, 2^4165504165 is an apocalyptic number.

It is an amenable number.

4165504165 is a deficient number, since it is larger than the sum of its proper divisors (833100839).

4165504165 is an equidigital number, since it uses as much as digits as its factorization.

4165504165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833100838.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 4165504165 is about 64540.7171094341. The cubic root of 4165504165 is about 1608.9993093538. Note that the first 3 decimals are identical.

Adding to 4165504165 its reverse (5614055614), we get a palindrome (9779559779).

The spelling of 4165504165 in words is "four billion, one hundred sixty-five million, five hundred four thousand, one hundred sixty-five".