724560610621321 has 2 divisors, whose sum is σ = 724560610621322. Its totient is φ = 724560610621320.

The previous prime is 724560610621259. The next prime is 724560610621327. The reversal of 724560610621321 is 123126016065427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 723996819881721 + 563790739600 = 26907189^2 + 750860^2 .

It is a cyclic number.

It is not a de Polignac number, because 724560610621321 - 2²¹ = 724560608524169 is a prime.

It is not a weakly prime, because it can be changed into another prime (724560610621327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362280305310660 + 362280305310661.

It is an arithmetic number, because the mean of its divisors is an integer number (362280305310661).

Almost surely, 2^{724560610621321} is an apocalyptic number.

It is an amenable number.

724560610621321 is a deficient number, since it is larger than the sum of its proper divisors (1).

724560610621321 is an equidigital number, since it uses as much as digits as its factorization.

724560610621321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

Adding to 724560610621321 its reverse (123126016065427), we get a palindrome (847686626686748).

The spelling of 724560610621321 in words is "seven hundred twenty-four trillion, five hundred sixty billion, six hundred ten million, six hundred twenty-one thousand, three hundred twenty-one".