165049330517 has 4 divisors (see below), whose sum is σ = 165266216076. Its totient is φ = 164832444960.

The previous prime is 165049330513. The next prime is 165049330561. The reversal of 165049330517 is 715033940561.

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 45990518116 + 119058812401 = 214454^2 + 345049^2 .

It is a cyclic number.

It is not a de Polignac number, because 165049330517 - 2² = 165049330513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165049330513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108441638 + ... + 108443159.

It is an arithmetic number, because the mean of its divisors is an integer number (41316554019).

Almost surely, 2^165049330517 is an apocalyptic number.

It is an amenable number.

165049330517 is a deficient number, since it is larger than the sum of its proper divisors (216885559).

165049330517 is an equidigital number, since it uses as much as digits as its factorization.

165049330517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216885558.

The product of its (nonzero) digits is 340200, while the sum is 44.

The spelling of 165049330517 in words is "one hundred sixty-five billion, forty-nine million, three hundred thirty thousand, five hundred seventeen".