686857840012 has 24 divisors (see below), whose sum is σ = 1236536167104. Its totient is φ = 333668464512.

The previous prime is 686857840007. The next prime is 686857840033. The reversal of 686857840012 is 210048758686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13308183 + ... + 13359694.

It is an arithmetic number, because the mean of its divisors is an integer number (51522340296).

Almost surely, 2^686857840012 is an apocalyptic number.

It is an amenable number.

686857840012 is a deficient number, since it is larger than the sum of its proper divisors (549678327092).

686857840012 is a wasteful number, since it uses less digits than its factorization.

686857840012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26668065 (or 26668063 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 686857840012 in words is "six hundred eighty-six billion, eight hundred fifty-seven million, eight hundred forty thousand, twelve".