195421009017 has 16 divisors (see below), whose sum is σ = 280633127040. Its totient is φ = 120246824832.

The previous prime is 195421009013. The next prime is 195421009019. The reversal of 195421009017 is 710900124591.

It is not a de Polignac number, because 195421009017 - 2² = 195421009013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (195421009013) 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 in 15 ways as a sum of consecutive naturals, for example, 139909 + ... + 640637.

It is an arithmetic number, because the mean of its divisors is an integer number (17539570440).

Almost surely, 2^195421009017 is an apocalyptic number.

It is an amenable number.

195421009017 is a deficient number, since it is larger than the sum of its proper divisors (85212118023).

195421009017 is a wasteful number, since it uses less digits than its factorization.

195421009017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510752.

The product of its (nonzero) digits is 22680, while the sum is 39.

The spelling of 195421009017 in words is "one hundred ninety-five billion, four hundred twenty-one million, nine thousand, seventeen".