686434434686 has 192 divisors, whose sum is σ = 1497750367680. Its totient is φ = 231128432640.

The previous prime is 686434434677. The next prime is 686434434701.

686434434686 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45972470 + ... + 45987398.

It is an arithmetic number, because the mean of its divisors is an integer number (7800783165).

Almost surely, 2^686434434686 is an apocalyptic number.

686434434686 is an abundant number, since it is smaller than the sum of its proper divisors (811315932994).

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

686434434686 is a wasteful number, since it uses less digits than its factorization.

686434434686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15179 (or 15172 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 62.

The spelling of 686434434686 in words is "six hundred eighty-six billion, four hundred thirty-four million, four hundred thirty-four thousand, six hundred eighty-six".