82077218685 has 96 divisors (see below), whose sum is σ = 186707589120. Its totient is φ = 32314723200.

The previous prime is 82077218683. The next prime is 82077218689. The reversal of 82077218685 is 58681277028.

It is not a de Polignac number, because 82077218685 - 2¹ = 82077218683 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82077218683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 557521 + ... + 689190.

It is an arithmetic number, because the mean of its divisors is an integer number (1944870720).

Almost surely, 2^82077218685 is an apocalyptic number.

It is an amenable number.

82077218685 is an abundant number, since it is smaller than the sum of its proper divisors (104630370435).

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

82077218685 is a wasteful number, since it uses less digits than its factorization.

82077218685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246759 (or 1246756 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 82077218685 in words is "eighty-two billion, seventy-seven million, two hundred eighteen thousand, six hundred eighty-five".