686181128482 has 4 divisors (see below), whose sum is σ = 1029271692726. Its totient is φ = 343090564240.

The previous prime is 686181128371. The next prime is 686181128489. The reversal of 686181128482 is 284821181686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 496293479361 + 189887649121 = 704481^2 + 435761^2 .

It is not an unprimeable number, because it can be changed into a prime (686181128489) 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 as a sum of consecutive naturals, namely, 171545282119 + ... + 171545282122.

Almost surely, 2^686181128482 is an apocalyptic number.

686181128482 is a deficient number, since it is larger than the sum of its proper divisors (343090564244).

686181128482 is a wasteful number, since it uses less digits than its factorization.

686181128482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343090564243.

The product of its digits is 2359296, while the sum is 55.

The spelling of 686181128482 in words is "six hundred eighty-six billion, one hundred eighty-one million, one hundred twenty-eight thousand, four hundred eighty-two".