195891639198 has 8 divisors (see below), whose sum is σ = 391783278408. Its totient is φ = 65297213064.

The previous prime is 195891639197. The next prime is 195891639221. The reversal of 195891639198 is 891936198591.

It is a sphenic number, since it is the product of 3 distinct primes.

195891639198 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195891639197) 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, 16324303261 + ... + 16324303272.

It is an arithmetic number, because the mean of its divisors is an integer number (48972909801).

Almost surely, 2^195891639198 is an apocalyptic number.

195891639198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

195891639198 is a wasteful number, since it uses less digits than its factorization.

195891639198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32648606538.

The product of its digits is 37791360, while the sum is 69.

The spelling of 195891639198 in words is "one hundred ninety-five billion, eight hundred ninety-one million, six hundred thirty-nine thousand, one hundred ninety-eight".