165721079134 has 8 divisors (see below), whose sum is σ = 267703281720. Its totient is φ = 76486651896.

The previous prime is 165721079119. The next prime is 165721079143. The reversal of 165721079134 is 431970127561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3186943804 + ... + 3186943855.

It is an arithmetic number, because the mean of its divisors is an integer number (33462910215).

Almost surely, 2^165721079134 is an apocalyptic number.

165721079134 is a deficient number, since it is larger than the sum of its proper divisors (101982202586).

165721079134 is a wasteful number, since it uses less digits than its factorization.

165721079134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6373887674.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 165721079134 in words is "one hundred sixty-five billion, seven hundred twenty-one million, seventy-nine thousand, one hundred thirty-four".