165120416519 has 4 divisors (see below), whose sum is σ = 170446881600. Its totient is φ = 159793951440.

The previous prime is 165120416507. The next prime is 165120416533. The reversal of 165120416519 is 915614021561.

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

It is a cyclic number.

It is not a de Polignac number, because 165120416519 - 2³⁶ = 96400939783 is a prime.

It is a super-2 number, since 2×165120416519² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165120416569) 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, 2663232494 + ... + 2663232555.

It is an arithmetic number, because the mean of its divisors is an integer number (42611720400).

Almost surely, 2^165120416519 is an apocalyptic number.

165120416519 is a deficient number, since it is larger than the sum of its proper divisors (5326465081).

165120416519 is an equidigital number, since it uses as much as digits as its factorization.

165120416519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326465080.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 165120416519 in words is "one hundred sixty-five billion, one hundred twenty million, four hundred sixteen thousand, five hundred nineteen".