823681582849 has 8 divisors (see below), whose sum is σ = 830145532608. Its totient is φ = 817235868240.

The previous prime is 823681582817. The next prime is 823681582891. The reversal of 823681582849 is 948285186328.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 823681582849 - 2⁵ = 823681582817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823681582049) 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 7 ways as a sum of consecutive naturals, for example, 4468087 + ... + 4648780.

It is an arithmetic number, because the mean of its divisors is an integer number (103768191576).

Almost surely, 2^823681582849 is an apocalyptic number.

It is an amenable number.

823681582849 is a deficient number, since it is larger than the sum of its proper divisors (6463949759).

823681582849 is a wasteful number, since it uses less digits than its factorization.

823681582849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9117575.

The product of its digits is 53084160, while the sum is 64.

The spelling of 823681582849 in words is "eight hundred twenty-three billion, six hundred eighty-one million, five hundred eighty-two thousand, eight hundred forty-nine".