161146672309 has 4 divisors (see below), whose sum is σ = 184167625504. Its totient is φ = 138125719116.

The previous prime is 161146672283. The next prime is 161146672319. The reversal of 161146672309 is 903276641161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161146672309 - 2²¹ = 161144575157 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 (161146672319) by changing a digit.

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, 11510476587 + ... + 11510476600.

It is an arithmetic number, because the mean of its divisors is an integer number (46041906376).

Almost surely, 2^161146672309 is an apocalyptic number.

It is an amenable number.

161146672309 is a deficient number, since it is larger than the sum of its proper divisors (23020953195).

161146672309 is an equidigital number, since it uses as much as digits as its factorization.

161146672309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23020953194.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 161146672309 in words is "one hundred sixty-one billion, one hundred forty-six million, six hundred seventy-two thousand, three hundred nine".