165500840339 has 4 divisors (see below), whose sum is σ = 165884833440. Its totient is φ = 165116847240.

The previous prime is 165500840303. The next prime is 165500840357. The reversal of 165500840339 is 933048005561.

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 165500840339 - 2²⁰ = 165499791763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165500840339.

It is not an unprimeable number, because it can be changed into a prime (165500840369) 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, 191995904 + ... + 191996765.

It is an arithmetic number, because the mean of its divisors is an integer number (41471208360).

Almost surely, 2^165500840339 is an apocalyptic number.

165500840339 is a deficient number, since it is larger than the sum of its proper divisors (383993101).

165500840339 is an equidigital number, since it uses as much as digits as its factorization.

165500840339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383993100.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 165500840339 in words is "one hundred sixty-five billion, five hundred million, eight hundred forty thousand, three hundred thirty-nine".