9988832821805 has 32 divisors (see below), whose sum is σ = 12258271334400. Its totient is φ = 7811976923712.

The previous prime is 9988832821789. The next prime is 9988832821841. The reversal of 9988832821805 is 5081282388899.

It is a cyclic number.

It is not a de Polignac number, because 9988832821805 - 2⁴ = 9988832821789 is a prime.

It is a super-2 number, since 2×9988832821805² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 285876026 + ... + 285910964.

It is an arithmetic number, because the mean of its divisors is an integer number (383070979200).

Almost surely, 2^{9988832821805} is an apocalyptic number.

It is an amenable number.

9988832821805 is a deficient number, since it is larger than the sum of its proper divisors (2269438512595).

9988832821805 is a wasteful number, since it uses less digits than its factorization.

9988832821805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42153.

The product of its (nonzero) digits is 159252480, while the sum is 71.

The spelling of 9988832821805 in words is "nine trillion, nine hundred eighty-eight billion, eight hundred thirty-two million, eight hundred twenty-one thousand, eight hundred five".