10568385521 has 2 divisors, whose sum is σ = 10568385522. Its totient is φ = 10568385520.

The previous prime is 10568385511. The next prime is 10568385533. The reversal of 10568385521 is 12558386501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6741231025 + 3827154496 = 82105^2 + 61864^2 .

It is an emirp because it is prime and its reverse (12558386501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10568385521 - 2¹⁴ = 10568369137 is a prime.

It is a super-2 number, since 2×10568385521² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10568385511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5284192760 + 5284192761.

It is an arithmetic number, because the mean of its divisors is an integer number (5284192761).

Almost surely, 2^10568385521 is an apocalyptic number.

It is an amenable number.

10568385521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10568385521 is an equidigital number, since it uses as much as digits as its factorization.

10568385521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 10568385521 in words is "ten billion, five hundred sixty-eight million, three hundred eighty-five thousand, five hundred twenty-one".