82440889656 has 96 divisors (see below), whose sum is σ = 212368703760. Its totient is φ = 26668002816.

The previous prime is 82440889639. The next prime is 82440889681. The reversal of 82440889656 is 65698804428.

It is a self number, because there is not a number n which added to its sum of digits gives 82440889656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6961116 + ... + 6972948.

Almost surely, 2^82440889656 is an apocalyptic number.

82440889656 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82440889656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106184351880).

82440889656 is an abundant number, since it is smaller than the sum of its proper divisors (129927814104).

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

82440889656 is a wasteful number, since it uses less digits than its factorization.

82440889656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12085 (or 12038 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 60.

The spelling of 82440889656 in words is "eighty-two billion, four hundred forty million, eight hundred eighty-nine thousand, six hundred fifty-six".