161109419585 has 8 divisors (see below), whose sum is σ = 193333955136. Its totient is φ = 128885767920.

The previous prime is 161109419567. The next prime is 161109419587. The reversal of 161109419585 is 585914901161.

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

It is a de Polignac number, because none of the positive numbers 2^k-161109419585 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161109419587) 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 7 ways as a sum of consecutive naturals, for example, 285620 + ... + 635450.

It is an arithmetic number, because the mean of its divisors is an integer number (24166744392).

Almost surely, 2^161109419585 is an apocalyptic number.

It is an amenable number.

161109419585 is a deficient number, since it is larger than the sum of its proper divisors (32224535551).

161109419585 is an equidigital number, since it uses as much as digits as its factorization.

161109419585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441943.

The product of its (nonzero) digits is 388800, while the sum is 50.

The spelling of 161109419585 in words is "one hundred sixty-one billion, one hundred nine million, four hundred nineteen thousand, five hundred eighty-five".