16444844461 has 4 divisors (see below), whose sum is σ = 16590374172. Its totient is φ = 16299314752.

The previous prime is 16444844441. The next prime is 16444844467.

16444844461 is nontrivially palindromic in base 10.

16444844461 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 can be written as a sum of positive squares in 2 ways, for example, as 2189678436 + 14255166025 = 46794^2 + 119395^2 .

It is a cyclic number.

It is not a de Polignac number, because 16444844461 - 2⁷ = 16444844333 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 (16444844467) 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 3 ways as a sum of consecutive naturals, for example, 72764686 + ... + 72764911.

It is an arithmetic number, because the mean of its divisors is an integer number (4147593543).

Almost surely, 2^16444844461 is an apocalyptic number.

It is an amenable number.

16444844461 is a deficient number, since it is larger than the sum of its proper divisors (145529711).

16444844461 is a wasteful number, since it uses less digits than its factorization.

16444844461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145529710.

The product of its digits is 1179648, while the sum is 46.

The spelling of 16444844461 in words is "sixteen billion, four hundred forty-four million, eight hundred forty-four thousand, four hundred sixty-one".