646415214241 has 2 divisors, whose sum is σ = 646415214242. Its totient is φ = 646415214240.

The previous prime is 646415214191. The next prime is 646415214251. The reversal of 646415214241 is 142412514646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614969640000 + 31445574241 = 784200^2 + 177329^2 .

It is a cyclic number.

It is not a de Polignac number, because 646415214241 - 2²³ = 646406825633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646415214194 and 646415214203.

It is not a weakly prime, because it can be changed into another prime (646415214251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323207607120 + 323207607121.

It is an arithmetic number, because the mean of its divisors is an integer number (323207607121).

Almost surely, 2^646415214241 is an apocalyptic number.

It is an amenable number.

646415214241 is a deficient number, since it is larger than the sum of its proper divisors (1).

646415214241 is an equidigital number, since it uses as much as digits as its factorization.

646415214241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 40.

Adding to 646415214241 its reverse (142412514646), we get a palindrome (788827728887).

The spelling of 646415214241 in words is "six hundred forty-six billion, four hundred fifteen million, two hundred fourteen thousand, two hundred forty-one".