91545911836189 has 2 divisors, whose sum is σ = 91545911836190. Its totient is φ = 91545911836188.

The previous prime is 91545911836163. The next prime is 91545911836229. The reversal of 91545911836189 is 98163811954519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73874540700900 + 17671371135289 = 8595030^2 + 4203733^2 .

It is an emirp because it is prime and its reverse (98163811954519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91545911836189 - 2⁷ = 91545911836061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91545911831189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45772955918094 + 45772955918095.

It is an arithmetic number, because the mean of its divisors is an integer number (45772955918095).

Almost surely, 2^{91545911836189} is an apocalyptic number.

It is an amenable number.

91545911836189 is a deficient number, since it is larger than the sum of its proper divisors (1).

91545911836189 is an equidigital number, since it uses as much as digits as its factorization.

91545911836189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83980800, while the sum is 70.

The spelling of 91545911836189 in words is "ninety-one trillion, five hundred forty-five billion, nine hundred eleven million, eight hundred thirty-six thousand, one hundred eighty-nine".