8821216630449 has 12 divisors (see below), whose sum is σ = 12742347832500. Its totient is φ = 5880538558944.

The previous prime is 8821216630411. The next prime is 8821216630459. The reversal of 8821216630449 is 9440366121288.

8821216630449 is a `hidden beast` number, since 8 + 8 + 2 + 1 + 2 + 166 + 30 + 449 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5896665173025 + 2924551457424 = 2428305^2 + 1710132^2 .

It is not a de Polignac number, because 8821216630449 - 2²⁴ = 8821199853233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8821216630395 and 8821216630404.

It is not an unprimeable number, because it can be changed into a prime (8821216630409) 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 11 ways as a sum of consecutive naturals, for example, 22505574 + ... + 22894175.

It is an arithmetic number, because the mean of its divisors is an integer number (1061862319375).

Almost surely, 2^{8821216630449} is an apocalyptic number.

It is an amenable number.

8821216630449 is a deficient number, since it is larger than the sum of its proper divisors (3921131202051).

8821216630449 is a wasteful number, since it uses less digits than its factorization.

8821216630449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45421344 (or 45421341 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 8821216630449 in words is "eight trillion, eight hundred twenty-one billion, two hundred sixteen million, six hundred thirty thousand, four hundred forty-nine".