11543871839 has 2 divisors, whose sum is σ = 11543871840. Its totient is φ = 11543871838.

The previous prime is 11543871817. The next prime is 11543871851. The reversal of 11543871839 is 93817834511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11543871839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11543871139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771935919 + 5771935920.

It is an arithmetic number, because the mean of its divisors is an integer number (5771935920).

Almost surely, 2^11543871839 is an apocalyptic number.

11543871839 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543871839 is an equidigital number, since it uses as much as digits as its factorization.

11543871839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The spelling of 11543871839 in words is "eleven billion, five hundred forty-three million, eight hundred seventy-one thousand, eight hundred thirty-nine".