195779889468 has 36 divisors (see below), whose sum is σ = 508263410200. Its totient is φ = 63496179936.

The previous prime is 195779889443. The next prime is 195779889511. The reversal of 195779889468 is 864988977591.

195779889468 is a `hidden beast` number, since 1 + 9 + 5 + 7 + 79 + 8 + 89 + 468 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 73489618 + ... + 73492281.

Almost surely, 2^195779889468 is an apocalyptic number.

195779889468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

195779889468 is an abundant number, since it is smaller than the sum of its proper divisors (312483520732).

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

195779889468 is a wasteful number, since it uses less digits than its factorization.

195779889468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146981946 (or 146981941 counting only the distinct ones).

The product of its digits is 2194698240, while the sum is 81.

The spelling of 195779889468 in words is "one hundred ninety-five billion, seven hundred seventy-nine million, eight hundred eighty-nine thousand, four hundred sixty-eight".