195290748181 has 2 divisors, whose sum is σ = 195290748182. Its totient is φ = 195290748180.

The previous prime is 195290748161. The next prime is 195290748197. The reversal of 195290748181 is 181847092591.

195290748181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168120500625 + 27170247556 = 410025^2 + 164834^2 .

It is a cyclic number.

It is not a de Polignac number, because 195290748181 - 2³¹ = 193143264533 is a prime.

It is a super-3 number, since 3×195290748181³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195290748101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97645374090 + 97645374091.

It is an arithmetic number, because the mean of its divisors is an integer number (97645374091).

Almost surely, 2^195290748181 is an apocalyptic number.

It is an amenable number.

195290748181 is a deficient number, since it is larger than the sum of its proper divisors (1).

195290748181 is an equidigital number, since it uses as much as digits as its factorization.

195290748181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 195290748181 in words is "one hundred ninety-five billion, two hundred ninety million, seven hundred forty-eight thousand, one hundred eighty-one".