195179871721041 has 9 divisors (see below), whose sum is σ = 281926541914459. Its totient is φ = 130119886539336.

The previous prime is 195179871721007. The next prime is 195179871721061. The reversal of 195179871721041 is 140127178971591.

The square root of 195179871721041 is 13970679.

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

195179871721041 is a `hidden beast` number, since 1 + 9 + 517 + 9 + 8 + 7 + 1 + 7 + 2 + 104 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 181052767692225 + 14127104028816 = 13455585^2 + 3758604^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 195179871721041 - 2¹⁹ = 195179871196753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 195179871721041.

It is not an unprimeable number, because it can be changed into a prime (195179871721061) 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, 39583591 + ... + 44240483.

Almost surely, 2^{195179871721041} is an apocalyptic number.

195179871721041 is the 13970679-th square number.

195179871721041 is the 6985340-th centered octagonal number.

It is an amenable number.

195179871721041 is a deficient number, since it is larger than the sum of its proper divisors (86746670193418).

195179871721041 is an frugal number, since it uses more digits than its factorization.

195179871721041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9313792 (or 4656896 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 63.

The spelling of 195179871721041 in words is "one hundred ninety-five trillion, one hundred seventy-nine billion, eight hundred seventy-one million, seven hundred twenty-one thousand, forty-one".