144444334431781 has 2 divisors, whose sum is σ = 144444334431782. Its totient is φ = 144444334431780.

The previous prime is 144444334431751. The next prime is 144444334432037. The reversal of 144444334431781 is 187134433444441.

144444334431781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115970477943681 + 28473856488100 = 10768959^2 + 5336090^2 .

It is a cyclic number.

It is not a de Polignac number, because 144444334431781 - 2⁹ = 144444334431269 is a prime.

It is a super-2 number, since 2×144444334431781² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144444334431701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72222167215890 + 72222167215891.

It is an arithmetic number, because the mean of its divisors is an integer number (72222167215891).

Almost surely, 2^{144444334431781} is an apocalyptic number.

It is an amenable number.

144444334431781 is a deficient number, since it is larger than the sum of its proper divisors (1).

144444334431781 is an equidigital number, since it uses as much as digits as its factorization.

144444334431781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24772608, while the sum is 55.

The spelling of 144444334431781 in words is "one hundred forty-four trillion, four hundred forty-four billion, three hundred thirty-four million, four hundred thirty-one thousand, seven hundred eighty-one".