620544626089 has 2 divisors, whose sum is σ = 620544626090. Its totient is φ = 620544626088.

The previous prime is 620544626087. The next prime is 620544626189. The reversal of 620544626089 is 980626445026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596705266089 + 23839360000 = 772467^2 + 154400^2 .

It is a cyclic number.

It is not a de Polignac number, because 620544626089 - 2¹ = 620544626087 is a prime.

Together with 620544626087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (620544626083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310272313044 + 310272313045.

It is an arithmetic number, because the mean of its divisors is an integer number (310272313045).

Almost surely, 2^620544626089 is an apocalyptic number.

It is an amenable number.

620544626089 is a deficient number, since it is larger than the sum of its proper divisors (1).

620544626089 is an equidigital number, since it uses as much as digits as its factorization.

620544626089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 620544626089 in words is "six hundred twenty billion, five hundred forty-four million, six hundred twenty-six thousand, eighty-nine".