161447744161 has 16 divisors (see below), whose sum is σ = 176596135488. Its totient is φ = 146378433600.

The previous prime is 161447744131. The next prime is 161447744173.

161447744161 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161447744161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161447744111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6502591 + ... + 6527371.

It is an arithmetic number, because the mean of its divisors is an integer number (11037258468).

Almost surely, 2^161447744161 is an apocalyptic number.

161447744161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161447744161 is a deficient number, since it is larger than the sum of its proper divisors (15148391327).

161447744161 is a wasteful number, since it uses less digits than its factorization.

161447744161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26352.

The product of its digits is 451584, while the sum is 46.

The spelling of 161447744161 in words is "one hundred sixty-one billion, four hundred forty-seven million, seven hundred forty-four thousand, one hundred sixty-one".