195643443856 has 45 divisors (see below), whose sum is σ = 440974299369. Its totient is φ = 83841882432.

The previous prime is 195643443851. The next prime is 195643443869. The reversal of 195643443856 is 658344346591.

The square root of 195643443856 is 442316.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 142566656400 + 53076787456 = 377580^2 + 230384^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195643443856.

It is not an unprimeable number, because it can be changed into a prime (195643443851) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12376950 + ... + 12392746.

Almost surely, 2^195643443856 is an apocalyptic number.

195643443856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

195643443856 is the 442316-th square number.

It is an amenable number.

195643443856 is an abundant number, since it is smaller than the sum of its proper divisors (245330855513).

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

195643443856 is an frugal number, since it uses more digits than its factorization.

195643443856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31616 (or 15806 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 58.

The spelling of 195643443856 in words is "one hundred ninety-five billion, six hundred forty-three million, four hundred forty-three thousand, eight hundred fifty-six".