161841439479 has 4 divisors (see below), whose sum is σ = 215788585976. Its totient is φ = 107894292984.

The previous prime is 161841439453. The next prime is 161841439489. The reversal of 161841439479 is 974934148161.

161841439479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 161841439479 - 2⁵ = 161841439447 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 (161841439489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26973573244 + ... + 26973573249.

It is an arithmetic number, because the mean of its divisors is an integer number (53947146494).

Almost surely, 2^161841439479 is an apocalyptic number.

161841439479 is a deficient number, since it is larger than the sum of its proper divisors (53947146497).

161841439479 is an equidigital number, since it uses as much as digits as its factorization.

161841439479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53947146496.

The product of its digits is 5225472, while the sum is 57.

The spelling of 161841439479 in words is "one hundred sixty-one billion, eight hundred forty-one million, four hundred thirty-nine thousand, four hundred seventy-nine".