82221645444 has 24 divisors (see below), whose sum is σ = 191865895200. Its totient is φ = 27405016704.

The previous prime is 82221645439. The next prime is 82221645461. The reversal of 82221645444 is 44454612228.

It is a junction number, because it is equal to n+sod(n) for n = 82221645396 and 82221645405.

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 7 ways as a sum of consecutive naturals, for example, 115269 + ... + 421580.

It is an arithmetic number, because the mean of its divisors is an integer number (7994412300).

Almost surely, 2^82221645444 is an apocalyptic number.

It is an amenable number.

82221645444 is an abundant number, since it is smaller than the sum of its proper divisors (109644249756).

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

82221645444 is a wasteful number, since it uses less digits than its factorization.

82221645444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549619 (or 549617 counting only the distinct ones).

The product of its digits is 491520, while the sum is 42.

The spelling of 82221645444 in words is "eighty-two billion, two hundred twenty-one million, six hundred forty-five thousand, four hundred forty-four".