823681582847 has 4 divisors (see below), whose sum is σ = 824728193016. Its totient is φ = 822634972680.

The previous prime is 823681582817. The next prime is 823681582891. The reversal of 823681582847 is 748285186328.

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

It is a cyclic number.

It is not a de Polignac number, because 823681582847 - 2¹² = 823681578751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 823681582847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823681582817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523303904 + ... + 523305477.

It is an arithmetic number, because the mean of its divisors is an integer number (206182048254).

Almost surely, 2^823681582847 is an apocalyptic number.

823681582847 is a deficient number, since it is larger than the sum of its proper divisors (1046610169).

823681582847 is a wasteful number, since it uses less digits than its factorization.

823681582847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046610168.

The product of its digits is 41287680, while the sum is 62.

The spelling of 823681582847 in words is "eight hundred twenty-three billion, six hundred eighty-one million, five hundred eighty-two thousand, eight hundred forty-seven".