11091919061 has 2 divisors, whose sum is σ = 11091919062. Its totient is φ = 11091919060.

The previous prime is 11091919039. The next prime is 11091919117. The reversal of 11091919061 is 16091919011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10275674161 + 816244900 = 101369^2 + 28570^2 .

It is a cyclic number.

It is not a de Polignac number, because 11091919061 - 2⁶ = 11091918997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11091919001) 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, 5545959530 + 5545959531.

It is an arithmetic number, because the mean of its divisors is an integer number (5545959531).

Almost surely, 2^11091919061 is an apocalyptic number.

It is an amenable number.

11091919061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11091919061 is an equidigital number, since it uses as much as digits as its factorization.

11091919061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 38.

The spelling of 11091919061 in words is "eleven billion, ninety-one million, nine hundred nineteen thousand, sixty-one".