165122749439 has 4 divisors (see below), whose sum is σ = 165151759656. Its totient is φ = 165093739224.

The previous prime is 165122749409. The next prime is 165122749507. The reversal of 165122749439 is 934947221561.

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 165122749439 - 2³⁶ = 96403272703 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 (165122749409) 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, 14496569 + ... + 14507954.

It is an arithmetic number, because the mean of its divisors is an integer number (41287939914).

Almost surely, 2^165122749439 is an apocalyptic number.

165122749439 is a deficient number, since it is larger than the sum of its proper divisors (29010217).

165122749439 is an equidigital number, since it uses as much as digits as its factorization.

165122749439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29010216.

The product of its digits is 3265920, while the sum is 53.

The spelling of 165122749439 in words is "one hundred sixty-five billion, one hundred twenty-two million, seven hundred forty-nine thousand, four hundred thirty-nine".