620544626189 has 2 divisors, whose sum is σ = 620544626190. Its totient is φ = 620544626188.

The previous prime is 620544626089. The next prime is 620544626201. The reversal of 620544626189 is 981626445026.

It is a happy number.

620544626189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346293410089 + 274251216100 = 588467^2 + 523690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620544626189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620544626189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620544626089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310272313094 + 310272313095.

It is an arithmetic number, because the mean of its divisors is an integer number (310272313095).

Almost surely, 2^620544626189 is an apocalyptic number.

It is an amenable number.

620544626189 is a deficient number, since it is larger than the sum of its proper divisors (1).

620544626189 is an equidigital number, since it uses as much as digits as its factorization.

620544626189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 620544626189 in words is "six hundred twenty billion, five hundred forty-four million, six hundred twenty-six thousand, one hundred eighty-nine".