82161678708 has 72 divisors (see below), whose sum is σ = 219954433608. Its totient is φ = 25770221568.

The previous prime is 82161678679. The next prime is 82161678733. The reversal of 82161678708 is 80787616128.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41767914384 + 40393764324 = 204372^2 + 200982^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3140610 + ... + 3166662.

It is an arithmetic number, because the mean of its divisors is an integer number (3054922689).

Almost surely, 2^82161678708 is an apocalyptic number.

It is an amenable number.

82161678708 is an abundant number, since it is smaller than the sum of its proper divisors (137792754900).

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

82161678708 is a wasteful number, since it uses less digits than its factorization.

82161678708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31233 (or 31228 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 82161678708 in words is "eighty-two billion, one hundred sixty-one million, six hundred seventy-eight thousand, seven hundred eight".