82186978329693 has 20 divisors (see below), whose sum is σ = 122791893840000. Its totient is φ = 54782949613032.

The previous prime is 82186978329691. The next prime is 82186978329727. The reversal of 82186978329693 is 39692387968128.

82186978329693 is a `hidden beast` number, since 8 + 2 + 1 + 86 + 97 + 83 + 296 + 93 = 666.

It is not a de Polignac number, because 82186978329693 - 2¹ = 82186978329691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82186978329691) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 76959693 + ... + 78020306.

It is an arithmetic number, because the mean of its divisors is an integer number (6139594692000).

Almost surely, 2^{82186978329693} is an apocalyptic number.

It is an amenable number.

82186978329693 is a deficient number, since it is larger than the sum of its proper divisors (40604915510307).

82186978329693 is a wasteful number, since it uses less digits than its factorization.

82186978329693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154986558 (or 154986549 counting only the distinct ones).

The product of its digits is 3386105856, while the sum is 81.

The spelling of 82186978329693 in words is "eighty-two trillion, one hundred eighty-six billion, nine hundred seventy-eight million, three hundred twenty-nine thousand, six hundred ninety-three".