646224262422617 has 2 divisors, whose sum is σ = 646224262422618. Its totient is φ = 646224262422616.

The previous prime is 646224262422589. The next prime is 646224262422647. The reversal of 646224262422617 is 716224262422646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591977561086921 + 54246701335696 = 24330589^2 + 7365236^2 .

It is a cyclic number.

It is not a de Polignac number, because 646224262422617 - 2¹² = 646224262418521 is a prime.

It is not a weakly prime, because it can be changed into another prime (646224262422647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323112131211308 + 323112131211309.

It is an arithmetic number, because the mean of its divisors is an integer number (323112131211309).

Almost surely, 2^{646224262422617} is an apocalyptic number.

It is an amenable number.

646224262422617 is a deficient number, since it is larger than the sum of its proper divisors (1).

646224262422617 is an equidigital number, since it uses as much as digits as its factorization.

646224262422617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37158912, while the sum is 56.

The spelling of 646224262422617 in words is "six hundred forty-six trillion, two hundred twenty-four billion, two hundred sixty-two million, four hundred twenty-two thousand, six hundred seventeen".