11011116643 has 2 divisors, whose sum is σ = 11011116644. Its totient is φ = 11011116642.

The previous prime is 11011116637. The next prime is 11011116653. The reversal of 11011116643 is 34661111011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11011116643 - 2⁹ = 11011116131 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011116653) 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, 5505558321 + 5505558322.

It is an arithmetic number, because the mean of its divisors is an integer number (5505558322).

Almost surely, 2^11011116643 is an apocalyptic number.

11011116643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011116643 is an equidigital number, since it uses as much as digits as its factorization.

11011116643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 11011116643 its reverse (34661111011), we get a palindrome (45672227654).

The spelling of 11011116643 in words is "eleven billion, eleven million, one hundred sixteen thousand, six hundred forty-three".