195511221868 has 24 divisors (see below), whose sum is σ = 346858601600. Its totient is φ = 96408973440.

The previous prime is 195511221839. The next prime is 195511221869. The reversal of 195511221868 is 868122115591.

195511221868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (195511221869) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6590533 + ... + 6620131.

Almost surely, 2^195511221868 is an apocalyptic number.

It is an amenable number.

195511221868 is a deficient number, since it is larger than the sum of its proper divisors (151347379732).

195511221868 is a wasteful number, since it uses less digits than its factorization.

195511221868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52297 (or 52295 counting only the distinct ones).

The product of its digits is 345600, while the sum is 49.

The spelling of 195511221868 in words is "one hundred ninety-five billion, five hundred eleven million, two hundred twenty-one thousand, eight hundred sixty-eight".