195427018289 has 2 divisors, whose sum is σ = 195427018290. Its totient is φ = 195427018288.

The previous prime is 195427018277. The next prime is 195427018301. The reversal of 195427018289 is 982810724591.

It is a balanced prime because it is at equal distance from previous prime (195427018277) and next prime (195427018301).

It can be written as a sum of positive squares in only one way, i.e., 179443737664 + 15983280625 = 423608^2 + 126425^2 .

It is a cyclic number.

It is not a de Polignac number, because 195427018289 - 2¹² = 195427014193 is a prime.

It is not a weakly prime, because it can be changed into another prime (195427018789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97713509144 + 97713509145.

It is an arithmetic number, because the mean of its divisors is an integer number (97713509145).

Almost surely, 2^195427018289 is an apocalyptic number.

It is an amenable number.

195427018289 is a deficient number, since it is larger than the sum of its proper divisors (1).

195427018289 is an equidigital number, since it uses as much as digits as its factorization.

195427018289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 195427018289 in words is "one hundred ninety-five billion, four hundred twenty-seven million, eighteen thousand, two hundred eighty-nine".