195945219641 has 2 divisors, whose sum is σ = 195945219642. Its totient is φ = 195945219640.

The previous prime is 195945219599. The next prime is 195945219653. The reversal of 195945219641 is 146912549591.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189464325625 + 6480894016 = 435275^2 + 80504^2 .

It is an emirp because it is prime and its reverse (146912549591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195945219641 - 2¹⁴ = 195945203257 is a prime.

It is not a weakly prime, because it can be changed into another prime (195945213641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97972609820 + 97972609821.

It is an arithmetic number, because the mean of its divisors is an integer number (97972609821).

Almost surely, 2^195945219641 is an apocalyptic number.

It is an amenable number.

195945219641 is a deficient number, since it is larger than the sum of its proper divisors (1).

195945219641 is an equidigital number, since it uses as much as digits as its factorization.

195945219641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 56.

The spelling of 195945219641 in words is "one hundred ninety-five billion, nine hundred forty-five million, two hundred nineteen thousand, six hundred forty-one".