82431656685 has 24 divisors (see below), whose sum is σ = 163293187200. Its totient is φ = 37683042912.

The previous prime is 82431656683. The next prime is 82431656759. The reversal of 82431656685 is 58665613428.

82431656685 is a `hidden beast` number, since 82 + 431 + 6 + 56 + 6 + 85 = 666.

It is not a de Polignac number, because 82431656685 - 2¹ = 82431656683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82431656683) by changing a digit.

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, 130843585 + ... + 130844214.

It is an arithmetic number, because the mean of its divisors is an integer number (6803882800).

Almost surely, 2^82431656685 is an apocalyptic number.

It is an amenable number.

82431656685 is a deficient number, since it is larger than the sum of its proper divisors (80861530515).

82431656685 is a wasteful number, since it uses less digits than its factorization.

82431656685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261687817 (or 261687814 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 82431656685 in words is "eighty-two billion, four hundred thirty-one million, six hundred fifty-six thousand, six hundred eighty-five".