91611333911 has 2 divisors, whose sum is σ = 91611333912. Its totient is φ = 91611333910.

The previous prime is 91611333901. The next prime is 91611333923. The reversal of 91611333911 is 11933311619.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91611333911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91611333901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45805666955 + 45805666956.

It is an arithmetic number, because the mean of its divisors is an integer number (45805666956).

Almost surely, 2^91611333911 is an apocalyptic number.

91611333911 is a deficient number, since it is larger than the sum of its proper divisors (1).

91611333911 is an equidigital number, since it uses as much as digits as its factorization.

91611333911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 38.

The spelling of 91611333911 in words is "ninety-one billion, six hundred eleven million, three hundred thirty-three thousand, nine hundred eleven".