821889659382 has 16 divisors (see below), whose sum is σ = 1793213802432. Its totient is φ = 249057472520.

The previous prime is 821889659377. The next prime is 821889659389. The reversal of 821889659382 is 283956988128.

It is a super-2 number, since 2×821889659382² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821889659389) 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, 6226436748 + ... + 6226436879.

It is an arithmetic number, because the mean of its divisors is an integer number (112075862652).

Almost surely, 2^821889659382 is an apocalyptic number.

821889659382 is an abundant number, since it is smaller than the sum of its proper divisors (971324143050).

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

821889659382 is a wasteful number, since it uses less digits than its factorization.

821889659382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452873643.

The product of its digits is 119439360, while the sum is 69.

The spelling of 821889659382 in words is "eight hundred twenty-one billion, eight hundred eighty-nine million, six hundred fifty-nine thousand, three hundred eighty-two".