11543671813 has 2 divisors, whose sum is σ = 11543671814. Its totient is φ = 11543671812.

The previous prime is 11543671807. The next prime is 11543671829. The reversal of 11543671813 is 31817634511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11144391489 + 399280324 = 105567^2 + 19982^2 .

It is a cyclic number.

It is not a de Polignac number, because 11543671813 - 2⁹ = 11543671301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11543675813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771835906 + 5771835907.

It is an arithmetic number, because the mean of its divisors is an integer number (5771835907).

Almost surely, 2^11543671813 is an apocalyptic number.

It is an amenable number.

11543671813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543671813 is an equidigital number, since it uses as much as digits as its factorization.

11543671813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The spelling of 11543671813 in words is "eleven billion, five hundred forty-three million, six hundred seventy-one thousand, eight hundred thirteen".