194790195218 has 4 divisors (see below), whose sum is σ = 292185292830. Its totient is φ = 97395097608.

The previous prime is 194790195179. The next prime is 194790195221. The reversal of 194790195218 is 812591097491.

It is a happy number.

194790195218 is digitally balanced in base 3, 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 can be written as a sum of positive squares in only one way, i.e., 106826346649 + 87963848569 = 326843^2 + 296587^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48697548803 + ... + 48697548806.

Almost surely, 2^194790195218 is an apocalyptic number.

194790195218 is a deficient number, since it is larger than the sum of its proper divisors (97395097612).

194790195218 is an equidigital number, since it uses as much as digits as its factorization.

194790195218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97395097611.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The spelling of 194790195218 in words is "one hundred ninety-four billion, seven hundred ninety million, one hundred ninety-five thousand, two hundred eighteen".