687343647586 has 8 divisors (see below), whose sum is σ = 1037843388864. Its totient is φ = 341395851300.

The previous prime is 687343647583. The next prime is 687343647587. The reversal of 687343647586 is 685746343786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (687343647583) 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 in 3 ways as a sum of consecutive naturals, for example, 1137985870 + ... + 1137986473.

It is an arithmetic number, because the mean of its divisors is an integer number (129730423608).

Almost surely, 2^687343647586 is an apocalyptic number.

687343647586 is a deficient number, since it is larger than the sum of its proper divisors (350499741278).

687343647586 is a wasteful number, since it uses less digits than its factorization.

687343647586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275972496.

The product of its digits is 487710720, while the sum is 67.

The spelling of 687343647586 in words is "six hundred eighty-seven billion, three hundred forty-three million, six hundred forty-seven thousand, five hundred eighty-six".