82820781796 has 27 divisors (see below), whose sum is σ = 148997750139. Its totient is φ = 40280830848.

The previous prime is 82820781779. The next prime is 82820781851. The reversal of 82820781796 is 69718702828.

The square root of 82820781796 is 287786.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 33419496100 + 49401285696 = 182810^2 + 222264^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82820781796.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21294220 + ... + 21298108.

Almost surely, 2^82820781796 is an apocalyptic number.

82820781796 is the 287786-th square number.

It is an amenable number.

82820781796 is a deficient number, since it is larger than the sum of its proper divisors (66176968343).

82820781796 is an frugal number, since it uses more digits than its factorization.

82820781796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 58.

The spelling of 82820781796 in words is "eighty-two billion, eight hundred twenty million, seven hundred eighty-one thousand, seven hundred ninety-six".