82641857768 has 16 divisors (see below), whose sum is σ = 155250906660. Its totient is φ = 41241616000.

The previous prime is 82641857761. The next prime is 82641857783. The reversal of 82641857768 is 86775814628.

It can be written as a sum of positive squares in 2 ways, for example, as 82324234084 + 317623684 = 286922^2 + 17822^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 82641857768.

It is not an unprimeable number, because it can be changed into a prime (82641857761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9909683 + ... + 9918018.

Almost surely, 2^82641857768 is an apocalyptic number.

It is an amenable number.

82641857768 is a deficient number, since it is larger than the sum of its proper divisors (72609048892).

82641857768 is a wasteful number, since it uses less digits than its factorization.

82641857768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19828228 (or 19828224 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 62.

The spelling of 82641857768 in words is "eighty-two billion, six hundred forty-one million, eight hundred fifty-seven thousand, seven hundred sixty-eight".