686748822009 has 8 divisors (see below), whose sum is σ = 915674202240. Its totient is φ = 457827994896.

The previous prime is 686748821971. The next prime is 686748822041. The reversal of 686748822009 is 900228847686.

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

It is not a de Polignac number, because 686748822009 - 2⁸ = 686748821753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686748822059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769249 + ... + 1401870.

It is an arithmetic number, because the mean of its divisors is an integer number (114459275280).

Almost surely, 2^686748822009 is an apocalyptic number.

It is an amenable number.

686748822009 is a deficient number, since it is larger than the sum of its proper divisors (228925380231).

686748822009 is a wasteful number, since it uses less digits than its factorization.

686748822009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276559.

The product of its (nonzero) digits is 18579456, while the sum is 60.

The spelling of 686748822009 in words is "six hundred eighty-six billion, seven hundred forty-eight million, eight hundred twenty-two thousand, nine".