144147891281 has 2 divisors, whose sum is σ = 144147891282. Its totient is φ = 144147891280.

The previous prime is 144147891269. The next prime is 144147891311. The reversal of 144147891281 is 182198741441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136634468881 + 7513422400 = 369641^2 + 86680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144147891281 is a prime.

It is a super-2 number, since 2×144147891281² (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 (144147891211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72073945640 + 72073945641.

It is an arithmetic number, because the mean of its divisors is an integer number (72073945641).

Almost surely, 2^144147891281 is an apocalyptic number.

It is an amenable number.

144147891281 is a deficient number, since it is larger than the sum of its proper divisors (1).

144147891281 is an equidigital number, since it uses as much as digits as its factorization.

144147891281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 50.

The spelling of 144147891281 in words is "one hundred forty-four billion, one hundred forty-seven million, eight hundred ninety-one thousand, two hundred eighty-one".