165545750339 has 4 divisors (see below), whose sum is σ = 165546598560. Its totient is φ = 165544902120.

The previous prime is 165545750323. The next prime is 165545750347. The reversal of 165545750339 is 933057545561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 933057545561 = 35279 ⋅26447959.

It is a cyclic number.

It is not a de Polignac number, because 165545750339 - 2⁴ = 165545750323 is a prime.

It is a super-2 number, since 2×165545750339² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165545750369) 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, 32534 + ... + 576324.

It is an arithmetic number, because the mean of its divisors is an integer number (41386649640).

Almost surely, 2^165545750339 is an apocalyptic number.

165545750339 is a deficient number, since it is larger than the sum of its proper divisors (848221).

165545750339 is an equidigital number, since it uses as much as digits as its factorization.

165545750339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848220.

The product of its (nonzero) digits is 8505000, while the sum is 53.

The spelling of 165545750339 in words is "one hundred sixty-five billion, five hundred forty-five million, seven hundred fifty thousand, three hundred thirty-nine".