10365206561 has 4 divisors (see below), whose sum is σ = 10974924612. Its totient is φ = 9755488512.

The previous prime is 10365206549. The next prime is 10365206569. The reversal of 10365206561 is 16560256301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8342995600 + 2022210961 = 91340^2 + 44969^2 .

It is a cyclic number.

It is not a de Polignac number, because 10365206561 - 2¹⁰ = 10365205537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10365206569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304859000 + ... + 304859033.

It is an arithmetic number, because the mean of its divisors is an integer number (2743731153).

Almost surely, 2^10365206561 is an apocalyptic number.

It is an amenable number.

10365206561 is a deficient number, since it is larger than the sum of its proper divisors (609718051).

10365206561 is an equidigital number, since it uses as much as digits as its factorization.

10365206561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609718050.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 10365206561 in words is "ten billion, three hundred sixty-five million, two hundred six thousand, five hundred sixty-one".