161489172322 has 8 divisors (see below), whose sum is σ = 244141111296. Its totient is φ = 80108801892.

The previous prime is 161489172311. The next prime is 161489172331. The reversal of 161489172322 is 223271984161.

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

It is a super-2 number, since 2×161489172322² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317891818 + ... + 317892325.

It is an arithmetic number, because the mean of its divisors is an integer number (30517638912).

Almost surely, 2^161489172322 is an apocalyptic number.

161489172322 is a deficient number, since it is larger than the sum of its proper divisors (82651938974).

161489172322 is a wasteful number, since it uses less digits than its factorization.

161489172322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635784272.

The product of its digits is 290304, while the sum is 46.

The spelling of 161489172322 in words is "one hundred sixty-one billion, four hundred eighty-nine million, one hundred seventy-two thousand, three hundred twenty-two".