144001611431981 has 2 divisors, whose sum is σ = 144001611431982. Its totient is φ = 144001611431980.

The previous prime is 144001611431941. The next prime is 144001611432043. The reversal of 144001611431981 is 189134116100441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137435973909481 + 6565637522500 = 11723309^2 + 2562350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144001611431981 is a prime.

It is a super-2 number, since 2×144001611431981² (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 (144001611431941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72000805715990 + 72000805715991.

It is an arithmetic number, because the mean of its divisors is an integer number (72000805715991).

Almost surely, 2^{144001611431981} is an apocalyptic number.

It is an amenable number.

144001611431981 is a deficient number, since it is larger than the sum of its proper divisors (1).

144001611431981 is an equidigital number, since it uses as much as digits as its factorization.

144001611431981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 144001611431981 in words is "one hundred forty-four trillion, one billion, six hundred eleven million, four hundred thirty-one thousand, nine hundred eighty-one".