165980089567 has 4 divisors (see below), whose sum is σ = 166095918000. Its totient is φ = 165864261136.

The previous prime is 165980089537. The next prime is 165980089621. The reversal of 165980089567 is 765980089561.

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 165980089567 - 2³⁵ = 131620351199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165980089499 and 165980089508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165980089537) 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, 57912067 + ... + 57914932.

It is an arithmetic number, because the mean of its divisors is an integer number (41523979500).

Almost surely, 2^165980089567 is an apocalyptic number.

165980089567 is a deficient number, since it is larger than the sum of its proper divisors (115828433).

165980089567 is a wasteful number, since it uses less digits than its factorization.

165980089567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115828432.

The product of its (nonzero) digits is 32659200, while the sum is 64.

The spelling of 165980089567 in words is "one hundred sixty-five billion, nine hundred eighty million, eighty-nine thousand, five hundred sixty-seven".