144442943681 has 2 divisors, whose sum is σ = 144442943682. Its totient is φ = 144442943680.

The previous prime is 144442943633. The next prime is 144442943713. The reversal of 144442943681 is 186349244441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72288388225 + 72154555456 = 268865^2 + 268616^2 .

It is a cyclic number.

It is not a de Polignac number, because 144442943681 - 2¹⁴ = 144442927297 is a prime.

It is a super-2 number, since 2×144442943681² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (144442943581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72221471840 + 72221471841.

It is an arithmetic number, because the mean of its divisors is an integer number (72221471841).

Almost surely, 2^144442943681 is an apocalyptic number.

It is an amenable number.

144442943681 is a deficient number, since it is larger than the sum of its proper divisors (1).

144442943681 is an equidigital number, since it uses as much as digits as its factorization.

144442943681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2654208, while the sum is 50.

The spelling of 144442943681 in words is "one hundred forty-four billion, four hundred forty-two million, nine hundred forty-three thousand, six hundred eighty-one".