626445631634213 has 2 divisors, whose sum is σ = 626445631634214. Its totient is φ = 626445631634212.

The previous prime is 626445631634177. The next prime is 626445631634243. The reversal of 626445631634213 is 312436136544626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626379109939489 + 66521694724 = 25027567^2 + 257918^2 .

It is a cyclic number.

It is not a de Polignac number, because 626445631634213 - 2⁶ = 626445631634149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626445631634243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313222815817106 + 313222815817107.

It is an arithmetic number, because the mean of its divisors is an integer number (313222815817107).

Almost surely, 2^{626445631634213} is an apocalyptic number.

It is an amenable number.

626445631634213 is a deficient number, since it is larger than the sum of its proper divisors (1).

626445631634213 is an equidigital number, since it uses as much as digits as its factorization.

626445631634213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 56.

The spelling of 626445631634213 in words is "six hundred twenty-six trillion, four hundred forty-five billion, six hundred thirty-one million, six hundred thirty-four thousand, two hundred thirteen".