16144644161 has 2 divisors, whose sum is σ = 16144644162. Its totient is φ = 16144644160.

The previous prime is 16144644137. The next prime is 16144644181.

It is a happy number.

16144644161 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14366419600 + 1778224561 = 119860^2 + 42169^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16144644161 is a prime.

It is a super-2 number, since 2×16144644161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16144644181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8072322080 + 8072322081.

It is an arithmetic number, because the mean of its divisors is an integer number (8072322081).

Almost surely, 2^16144644161 is an apocalyptic number.

It is an amenable number.

16144644161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16144644161 is an equidigital number, since it uses as much as digits as its factorization.

16144644161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The spelling of 16144644161 in words is "sixteen billion, one hundred forty-four million, six hundred forty-four thousand, one hundred sixty-one".