161446720539 has 8 divisors (see below), whose sum is σ = 231820932112. Its totient is φ = 99351828000.

The previous prime is 161446720517. The next prime is 161446720541. The reversal of 161446720539 is 935027644161.

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

It is not a de Polignac number, because 161446720539 - 2⁵ = 161446720507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161446720579) 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, 2069829712 + ... + 2069829789.

It is an arithmetic number, because the mean of its divisors is an integer number (28977616514).

Almost surely, 2^161446720539 is an apocalyptic number.

161446720539 is a deficient number, since it is larger than the sum of its proper divisors (70374211573).

161446720539 is a wasteful number, since it uses less digits than its factorization.

161446720539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139659517.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 161446720539 in words is "one hundred sixty-one billion, four hundred forty-six million, seven hundred twenty thousand, five hundred thirty-nine".