195427018417 has 2 divisors, whose sum is σ = 195427018418. Its totient is φ = 195427018416.

The previous prime is 195427018357. The next prime is 195427018441. The reversal of 195427018417 is 714810724591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193508490816 + 1918527601 = 439896^2 + 43801^2 .

It is a cyclic number.

It is not a de Polignac number, because 195427018417 - 2⁷ = 195427018289 is a prime.

It is not a weakly prime, because it can be changed into another prime (195427018477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97713509208 + 97713509209.

It is an arithmetic number, because the mean of its divisors is an integer number (97713509209).

Almost surely, 2^195427018417 is an apocalyptic number.

It is an amenable number.

195427018417 is a deficient number, since it is larger than the sum of its proper divisors (1).

195427018417 is an equidigital number, since it uses as much as digits as its factorization.

195427018417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 195427018417 in words is "one hundred ninety-five billion, four hundred twenty-seven million, eighteen thousand, four hundred seventeen".