9825299564081 has 4 divisors (see below), whose sum is σ = 9867468231972. Its totient is φ = 9783130896192.

The previous prime is 9825299564071. The next prime is 9825299564089. The reversal of 9825299564081 is 1804659925289.

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 3008975929600 + 6816323634481 = 1734640^2 + 2610809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9825299564081 is a prime.

It is a super-2 number, since 2×9825299564081² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9825299564089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21084333596 + ... + 21084334061.

It is an arithmetic number, because the mean of its divisors is an integer number (2466867057993).

Almost surely, 2^{9825299564081} is an apocalyptic number.

It is an amenable number.

9825299564081 is a deficient number, since it is larger than the sum of its proper divisors (42168667891).

9825299564081 is a wasteful number, since it uses less digits than its factorization.

9825299564081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42168667890.

The product of its (nonzero) digits is 111974400, while the sum is 68.

The spelling of 9825299564081 in words is "nine trillion, eight hundred twenty-five billion, two hundred ninety-nine million, five hundred sixty-four thousand, eighty-one".