634426241362009 has 2 divisors, whose sum is σ = 634426241362010. Its totient is φ = 634426241362008.

The previous prime is 634426241361943. The next prime is 634426241362027. The reversal of 634426241362009 is 900263142624436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537551041411609 + 96875199950400 = 23185147^2 + 9842520^2 .

It is a cyclic number.

It is not a de Polignac number, because 634426241362009 - 2⁴⁹ = 71476287940697 is a prime.

It is not a weakly prime, because it can be changed into another prime (634426241362079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317213120681004 + 317213120681005.

It is an arithmetic number, because the mean of its divisors is an integer number (317213120681005).

Almost surely, 2^{634426241362009} is an apocalyptic number.

It is an amenable number.

634426241362009 is a deficient number, since it is larger than the sum of its proper divisors (1).

634426241362009 is an equidigital number, since it uses as much as digits as its factorization.

634426241362009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8957952, while the sum is 52.

The spelling of 634426241362009 in words is "six hundred thirty-four trillion, four hundred twenty-six billion, two hundred forty-one million, three hundred sixty-two thousand, nine".