144135314537581 has 2 divisors, whose sum is σ = 144135314537582. Its totient is φ = 144135314537580.

The previous prime is 144135314537573. The next prime is 144135314537639. The reversal of 144135314537581 is 185735413531441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118672895776681 + 25462418760900 = 10893709^2 + 5046030^2 .

It is a cyclic number.

It is not a de Polignac number, because 144135314537581 - 2³ = 144135314537573 is a prime.

It is a super-2 number, since 2×144135314537581² (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 (144135314534581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72067657268790 + 72067657268791.

It is an arithmetic number, because the mean of its divisors is an integer number (72067657268791).

Almost surely, 2^{144135314537581} is an apocalyptic number.

It is an amenable number.

144135314537581 is a deficient number, since it is larger than the sum of its proper divisors (1).

144135314537581 is an equidigital number, since it uses as much as digits as its factorization.

144135314537581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096000, while the sum is 55.

The spelling of 144135314537581 in words is "one hundred forty-four trillion, one hundred thirty-five billion, three hundred fourteen million, five hundred thirty-seven thousand, five hundred eighty-one".