161874730729 has 8 divisors (see below), whose sum is σ = 167023196928. Its totient is φ = 156797278080.

The previous prime is 161874730727. The next prime is 161874730753. The reversal of 161874730729 is 927037478161.

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

It is a cyclic number.

It is not a de Polignac number, because 161874730729 - 2¹ = 161874730727 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 161874730729.

It is not an unprimeable number, because it can be changed into a prime (161874730727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17748757 + ... + 17757874.

It is an arithmetic number, because the mean of its divisors is an integer number (20877899616).

Almost surely, 2^161874730729 is an apocalyptic number.

It is an amenable number.

161874730729 is a deficient number, since it is larger than the sum of its proper divisors (5148466199).

161874730729 is an equidigital number, since it uses as much as digits as its factorization.

161874730729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35506775.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 161874730729 in words is "one hundred sixty-one billion, eight hundred seventy-four million, seven hundred thirty thousand, seven hundred twenty-nine".