6431197679609 has 2 divisors, whose sum is σ = 6431197679610. Its totient is φ = 6431197679608.

The previous prime is 6431197679587. The next prime is 6431197679681. The reversal of 6431197679609 is 9069767911346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3525100125625 + 2906097553984 = 1877525^2 + 1704728^2 .

It is a cyclic number.

It is not a de Polignac number, because 6431197679609 - 2³² = 6426902712313 is a prime.

It is not a weakly prime, because it can be changed into another prime (6431197279609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3215598839804 + 3215598839805.

It is an arithmetic number, because the mean of its divisors is an integer number (3215598839805).

Almost surely, 2^{6431197679609} is an apocalyptic number.

It is an amenable number.

6431197679609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6431197679609 is an equidigital number, since it uses as much as digits as its factorization.

6431197679609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92588832, while the sum is 68.

The spelling of 6431197679609 in words is "six trillion, four hundred thirty-one billion, one hundred ninety-seven million, six hundred seventy-nine thousand, six hundred nine".