143666311433609 has 2 divisors, whose sum is σ = 143666311433610. Its totient is φ = 143666311433608.

The previous prime is 143666311433497. The next prime is 143666311433621. The reversal of 143666311433609 is 906334113666341.

143666311433609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81900418513225 + 61765892920384 = 9049885^2 + 7859128^2 .

It is an emirp because it is prime and its reverse (906334113666341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143666311433609 is a prime.

It is not a weakly prime, because it can be changed into another prime (143666311433009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71833155716804 + 71833155716805.

It is an arithmetic number, because the mean of its divisors is an integer number (71833155716805).

Almost surely, 2^{143666311433609} is an apocalyptic number.

It is an amenable number.

143666311433609 is a deficient number, since it is larger than the sum of its proper divisors (1).

143666311433609 is an equidigital number, since it uses as much as digits as its factorization.

143666311433609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 56.

The spelling of 143666311433609 in words is "one hundred forty-three trillion, six hundred sixty-six billion, three hundred eleven million, four hundred thirty-three thousand, six hundred nine".