728630584321 has 2 divisors, whose sum is σ = 728630584322. Its totient is φ = 728630584320.

The previous prime is 728630584273. The next prime is 728630584333. The reversal of 728630584321 is 123485036827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447412494321 + 281218090000 = 668889^2 + 530300^2 .

It is a cyclic number.

It is not a de Polignac number, because 728630584321 - 2¹⁹ = 728630060033 is a prime.

It is not a weakly prime, because it can be changed into another prime (728630584621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364315292160 + 364315292161.

It is an arithmetic number, because the mean of its divisors is an integer number (364315292161).

Almost surely, 2^728630584321 is an apocalyptic number.

It is an amenable number.

728630584321 is a deficient number, since it is larger than the sum of its proper divisors (1).

728630584321 is an equidigital number, since it uses as much as digits as its factorization.

728630584321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 728630584321 in words is "seven hundred twenty-eight billion, six hundred thirty million, five hundred eighty-four thousand, three hundred twenty-one".