620804519989 has 2 divisors, whose sum is σ = 620804519990. Its totient is φ = 620804519988.

The previous prime is 620804519983. The next prime is 620804520047. The reversal of 620804519989 is 989915408026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565970336100 + 54834183889 = 752310^2 + 234167^2 .

It is a cyclic number.

It is not a de Polignac number, because 620804519989 - 2¹⁷ = 620804388917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620804519983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310402259994 + 310402259995.

It is an arithmetic number, because the mean of its divisors is an integer number (310402259995).

Almost surely, 2^620804519989 is an apocalyptic number.

It is an amenable number.

620804519989 is a deficient number, since it is larger than the sum of its proper divisors (1).

620804519989 is an equidigital number, since it uses as much as digits as its factorization.

620804519989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 620804519989 in words is "six hundred twenty billion, eight hundred four million, five hundred nineteen thousand, nine hundred eighty-nine".