195564327089 has 4 divisors (see below), whose sum is σ = 195608308224. Its totient is φ = 195520345956.

The previous prime is 195564327071. The next prime is 195564327097. The reversal of 195564327089 is 980723465591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195564327089 - 2³² = 191269359793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195564327029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21983897 + ... + 21992790.

It is an arithmetic number, because the mean of its divisors is an integer number (48902077056).

It is a 1-persistent number, because it is pandigital, but 2⋅195564327089 = 391128654178 is not.

Almost surely, 2^195564327089 is an apocalyptic number.

It is an amenable number.

195564327089 is a deficient number, since it is larger than the sum of its proper divisors (43981135).

195564327089 is an equidigital number, since it uses as much as digits as its factorization.

195564327089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43981134.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 195564327089 in words is "one hundred ninety-five billion, five hundred sixty-four million, three hundred twenty-seven thousand, eighty-nine".