626063329921 has 2 divisors, whose sum is σ = 626063329922. Its totient is φ = 626063329920.

The previous prime is 626063329919. The next prime is 626063329933. The reversal of 626063329921 is 129923360626.

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., 600879226896 + 25184103025 = 775164^2 + 158695^2 .

It is a cyclic number.

It is not a de Polignac number, because 626063329921 - 2¹ = 626063329919 is a prime.

Together with 626063329919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (626063329421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313031664960 + 313031664961.

It is an arithmetic number, because the mean of its divisors is an integer number (313031664961).

Almost surely, 2^626063329921 is an apocalyptic number.

It is an amenable number.

626063329921 is a deficient number, since it is larger than the sum of its proper divisors (1).

626063329921 is an equidigital number, since it uses as much as digits as its factorization.

626063329921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 49.

The spelling of 626063329921 in words is "six hundred twenty-six billion, sixty-three million, three hundred twenty-nine thousand, nine hundred twenty-one".