195664559208 has 64 divisors (see below), whose sum is σ = 499803877440. Its totient is φ = 63809501184.

The previous prime is 195664559197. The next prime is 195664559219. The reversal of 195664559208 is 802955466591.

It is an interprime number because it is at equal distance from previous prime (195664559197) and next prime (195664559219).

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 231135 + ... + 666897.

It is an arithmetic number, because the mean of its divisors is an integer number (7809435585).

Almost surely, 2^195664559208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195664559208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249901938720).

195664559208 is an abundant number, since it is smaller than the sum of its proper divisors (304139318232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195664559208 is a wasteful number, since it uses less digits than its factorization.

195664559208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436178 (or 436174 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 60.

The spelling of 195664559208 in words is "one hundred ninety-five billion, six hundred sixty-four million, five hundred fifty-nine thousand, two hundred eight".