209152550195 has 4 divisors (see below), whose sum is σ = 250983060240. Its totient is φ = 167322040152.

The previous prime is 209152550161. The next prime is 209152550203. The reversal of 209152550195 is 591055251902.

209152550195 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209152550195 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20915255015 + ... + 20915255024.

It is an arithmetic number, because the mean of its divisors is an integer number (62745765060).

Almost surely, 2^209152550195 is an apocalyptic number.

209152550195 is a deficient number, since it is larger than the sum of its proper divisors (41830510045).

209152550195 is an equidigital number, since it uses as much as digits as its factorization.

209152550195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41830510044.

The product of its (nonzero) digits is 202500, while the sum is 44.

The spelling of 209152550195 in words is "two hundred nine billion, one hundred fifty-two million, five hundred fifty thousand, one hundred ninety-five".