2143613468509 has 2 divisors, whose sum is σ = 2143613468510. Its totient is φ = 2143613468508.

The previous prime is 2143613468467. The next prime is 2143613468527. The reversal of 2143613468509 is 9058643163412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1122307172100 + 1021306296409 = 1059390^2 + 1010597^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143613468509 - 2³⁵ = 2109253730141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143613468569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071806734254 + 1071806734255.

It is an arithmetic number, because the mean of its divisors is an integer number (1071806734255).

Almost surely, 2^{2143613468509} is an apocalyptic number.

It is an amenable number.

2143613468509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143613468509 is an equidigital number, since it uses as much as digits as its factorization.

2143613468509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 2143613468509 in words is "two trillion, one hundred forty-three billion, six hundred thirteen million, four hundred sixty-eight thousand, five hundred nine".