195563917920 has 384 divisors, whose sum is σ = 735579242496. Its totient is φ = 42702206976.

The previous prime is 195563917907. The next prime is 195563917921. The reversal of 195563917920 is 29719365591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195563917921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102549607 + ... + 102551513.

It is an arithmetic number, because the mean of its divisors is an integer number (1915570944).

Almost surely, 2^195563917920 is an apocalyptic number.

195563917920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195563917920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367789621248).

195563917920 is an abundant number, since it is smaller than the sum of its proper divisors (540015324576).

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

195563917920 is a wasteful number, since it uses less digits than its factorization.

195563917920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282 (or 3274 counting only the distinct ones).

The product of its (nonzero) digits is 4592700, while the sum is 57.

The spelling of 195563917920 in words is "one hundred ninety-five billion, five hundred sixty-three million, nine hundred seventeen thousand, nine hundred twenty".