686523748834 has 64 divisors (see below), whose sum is σ = 1351700444160. Its totient is φ = 253354288320.

The previous prime is 686523748783. The next prime is 686523748943. The reversal of 686523748834 is 438847325686.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19771192 + ... + 19805884.

It is an arithmetic number, because the mean of its divisors is an integer number (21120319440).

Almost surely, 2^686523748834 is an apocalyptic number.

686523748834 is a deficient number, since it is larger than the sum of its proper divisors (665176695326).

686523748834 is a wasteful number, since it uses less digits than its factorization.

686523748834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41495.

The product of its digits is 185794560, while the sum is 64.

The spelling of 686523748834 in words is "six hundred eighty-six billion, five hundred twenty-three million, seven hundred forty-eight thousand, eight hundred thirty-four".