11841863989 has 2 divisors, whose sum is σ = 11841863990. Its totient is φ = 11841863988.

The previous prime is 11841863987. The next prime is 11841864017. The reversal of 11841863989 is 98936814811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10246500625 + 1595363364 = 101225^2 + 39942^2 .

It is a cyclic number.

It is not a de Polignac number, because 11841863989 - 2¹ = 11841863987 is a prime.

Together with 11841863987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11841863987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5920931994 + 5920931995.

It is an arithmetic number, because the mean of its divisors is an integer number (5920931995).

Almost surely, 2^11841863989 is an apocalyptic number.

It is an amenable number.

11841863989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11841863989 is an equidigital number, since it uses as much as digits as its factorization.

11841863989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 58.

The spelling of 11841863989 in words is "eleven billion, eight hundred forty-one million, eight hundred sixty-three thousand, nine hundred eighty-nine".