417641371621 has 2 divisors, whose sum is σ = 417641371622. Its totient is φ = 417641371620.

The previous prime is 417641371607. The next prime is 417641371663. The reversal of 417641371621 is 126173146714.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358573416100 + 59067955521 = 598810^2 + 243039^2 .

It is a cyclic number.

It is not a de Polignac number, because 417641371621 - 2⁷ = 417641371493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (417641371321) 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, 208820685810 + 208820685811.

It is an arithmetic number, because the mean of its divisors is an integer number (208820685811).

Almost surely, 2^417641371621 is an apocalyptic number.

It is an amenable number.

417641371621 is a deficient number, since it is larger than the sum of its proper divisors (1).

417641371621 is an equidigital number, since it uses as much as digits as its factorization.

417641371621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The spelling of 417641371621 in words is "four hundred seventeen billion, six hundred forty-one million, three hundred seventy-one thousand, six hundred twenty-one".