195102478228561 has 2 divisors, whose sum is σ = 195102478228562. Its totient is φ = 195102478228560.

The previous prime is 195102478228519. The next prime is 195102478228591. The reversal of 195102478228561 is 165822874201591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168502310952336 + 26600167276225 = 12980844^2 + 5157535^2 .

It is a cyclic number.

It is not a de Polignac number, because 195102478228561 - 2¹³ = 195102478220369 is a prime.

It is a super-2 number, since 2×195102478228561² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 195102478228561.

It is not a weakly prime, because it can be changed into another prime (195102478228591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97551239114280 + 97551239114281.

It is an arithmetic number, because the mean of its divisors is an integer number (97551239114281).

Almost surely, 2^{195102478228561} is an apocalyptic number.

It is an amenable number.

195102478228561 is a deficient number, since it is larger than the sum of its proper divisors (1).

195102478228561 is an equidigital number, since it uses as much as digits as its factorization.

195102478228561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 195102478228561 in words is "one hundred ninety-five trillion, one hundred two billion, four hundred seventy-eight million, two hundred twenty-eight thousand, five hundred sixty-one".