620553219989 has 2 divisors, whose sum is σ = 620553219990. Its totient is φ = 620553219988.

The previous prime is 620553219967. The next prime is 620553220037. The reversal of 620553219989 is 989912355026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 613856580100 + 6696639889 = 783490^2 + 81833^2 .

It is a cyclic number.

It is not a de Polignac number, because 620553219989 - 2²⁰ = 620552171413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620553219889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310276609994 + 310276609995.

It is an arithmetic number, because the mean of its divisors is an integer number (310276609995).

Almost surely, 2^620553219989 is an apocalyptic number.

It is an amenable number.

620553219989 is a deficient number, since it is larger than the sum of its proper divisors (1).

620553219989 is an equidigital number, since it uses as much as digits as its factorization.

620553219989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 620553219989 in words is "six hundred twenty billion, five hundred fifty-three million, two hundred nineteen thousand, nine hundred eighty-nine".