11543185987 has 2 divisors, whose sum is σ = 11543185988. Its totient is φ = 11543185986.

The previous prime is 11543185873. The next prime is 11543185993. The reversal of 11543185987 is 78958134511.

It is a strong prime.

It is an emirp because it is prime and its reverse (78958134511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11543185987 is a prime.

It is not a weakly prime, because it can be changed into another prime (11543285987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771592993 + 5771592994.

It is an arithmetic number, because the mean of its divisors is an integer number (5771592994).

Almost surely, 2^11543185987 is an apocalyptic number.

11543185987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543185987 is an equidigital number, since it uses as much as digits as its factorization.

11543185987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 52.

The spelling of 11543185987 in words is "eleven billion, five hundred forty-three million, one hundred eighty-five thousand, nine hundred eighty-seven".