165907272959 has 4 divisors (see below), whose sum is σ = 166076050416. Its totient is φ = 165738495504.

The previous prime is 165907272953. The next prime is 165907272989. The reversal of 165907272959 is 959272709561.

165907272959 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 is a cyclic number.

It is not a de Polignac number, because 165907272959 - 2³² = 161612305663 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 (165907272953) by changing a digit.

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, 84387254 + ... + 84389219.

It is an arithmetic number, because the mean of its divisors is an integer number (41519012604).

Almost surely, 2^165907272959 is an apocalyptic number.

165907272959 is a deficient number, since it is larger than the sum of its proper divisors (168777457).

165907272959 is an equidigital number, since it uses as much as digits as its factorization.

165907272959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168777456.

The product of its (nonzero) digits is 21432600, while the sum is 62.

The spelling of 165907272959 in words is "one hundred sixty-five billion, nine hundred seven million, two hundred seventy-two thousand, nine hundred fifty-nine".