9165564091 has 2 divisors, whose sum is σ = 9165564092. Its totient is φ = 9165564090.

The previous prime is 9165564061. The next prime is 9165564137. The reversal of 9165564091 is 1904655619.

It is a happy number.

9165564091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (9165564137) can be obtained adding 9165564091 to its sum of digits (46).

It is a weak prime.

It is an emirp because it is prime and its reverse (1904655619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9165564091 - 2¹⁹ = 9165039803 is a prime.

It is not a weakly prime, because it can be changed into another prime (9165564061) 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, 4582782045 + 4582782046.

It is an arithmetic number, because the mean of its divisors is an integer number (4582782046).

Almost surely, 2^9165564091 is an apocalyptic number.

9165564091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9165564091 is an equidigital number, since it uses as much as digits as its factorization.

9165564091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 9165564091 is about 95736.9525888515. The cubic root of 9165564091 is about 2092.7614795425.

The spelling of 9165564091 in words is "nine billion, one hundred sixty-five million, five hundred sixty-four thousand, ninety-one".