822856081668 has 24 divisors (see below), whose sum is σ = 1920113519520. Its totient is φ = 274268789760.

The previous prime is 822856081661. The next prime is 822856081669. The reversal of 822856081668 is 866180658228.

It is a super-2 number, since 2×822856081668² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (822856081661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863613 + ... + 2262468.

It is an arithmetic number, because the mean of its divisors is an integer number (80004729980).

Almost surely, 2^822856081668 is an apocalyptic number.

It is an amenable number.

822856081668 is an abundant number, since it is smaller than the sum of its proper divisors (1097257437852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

822856081668 is a wasteful number, since it uses less digits than its factorization.

822856081668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142707 (or 4142705 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 60.

The spelling of 822856081668 in words is "eight hundred twenty-two billion, eight hundred fifty-six million, eighty-one thousand, six hundred sixty-eight".