872821643822 has 16 divisors (see below), whose sum is σ = 1317334045680. Its totient is φ = 433712340672.

The previous prime is 872821643801. The next prime is 872821643833. The reversal of 872821643822 is 228346128278.

It is a happy number.

872821643822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345629 + ... + 1365687.

It is an arithmetic number, because the mean of its divisors is an integer number (82333377855).

Almost surely, 2^872821643822 is an apocalyptic number.

872821643822 is a deficient number, since it is larger than the sum of its proper divisors (444512401858).

872821643822 is a wasteful number, since it uses less digits than its factorization.

872821643822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022707.

The product of its digits is 4128768, while the sum is 53.

The spelling of 872821643822 in words is "eight hundred seventy-two billion, eight hundred twenty-one million, six hundred forty-three thousand, eight hundred twenty-two".