16442112161 has 4 divisors (see below), whose sum is σ = 16467763524. Its totient is φ = 16416460800.

The previous prime is 16442112151. The next prime is 16442112209. The reversal of 16442112161 is 16121124461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11528102161 + 4914010000 = 107369^2 + 70100^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442112161 - 2¹⁴ = 16442095777 is a prime.

It is a super-3 number, since 3×16442112161³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16442112101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12824720 + ... + 12826001.

It is an arithmetic number, because the mean of its divisors is an integer number (4116940881).

Almost surely, 2^16442112161 is an apocalyptic number.

It is an amenable number.

16442112161 is a deficient number, since it is larger than the sum of its proper divisors (25651363).

16442112161 is an equidigital number, since it uses as much as digits as its factorization.

16442112161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25651362.

The product of its digits is 2304, while the sum is 29.

The spelling of 16442112161 in words is "sixteen billion, four hundred forty-two million, one hundred twelve thousand, one hundred sixty-one".