686948849686 has 8 divisors (see below), whose sum is σ = 1124098117704. Its totient is φ = 312249477120.

The previous prime is 686948849683. The next prime is 686948849707.

686948849686 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686948849683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15612473835 + ... + 15612473878.

It is an arithmetic number, because the mean of its divisors is an integer number (140512264713).

Almost surely, 2^686948849686 is an apocalyptic number.

686948849686 is a deficient number, since it is larger than the sum of its proper divisors (437149268018).

686948849686 is a wasteful number, since it uses less digits than its factorization.

686948849686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31224947726.

The product of its digits is 6879707136, while the sum is 82.

The spelling of 686948849686 in words is "six hundred eighty-six billion, nine hundred forty-eight million, eight hundred forty-nine thousand, six hundred eighty-six".