195421009067 has 2 divisors, whose sum is σ = 195421009068. Its totient is φ = 195421009066.

The previous prime is 195421009033. The next prime is 195421009159. The reversal of 195421009067 is 760900124591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195421009067 - 2²² = 195416814763 is a prime.

It is not a weakly prime, because it can be changed into another prime (195421009367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97710504533 + 97710504534.

It is an arithmetic number, because the mean of its divisors is an integer number (97710504534).

Almost surely, 2^195421009067 is an apocalyptic number.

195421009067 is a deficient number, since it is larger than the sum of its proper divisors (1).

195421009067 is an equidigital number, since it uses as much as digits as its factorization.

195421009067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 195421009067 in words is "one hundred ninety-five billion, four hundred twenty-one million, nine thousand, sixty-seven".