686869809726 has 8 divisors (see below), whose sum is σ = 1373739619464. Its totient is φ = 228956603240.

The previous prime is 686869809713. The next prime is 686869809727. The reversal of 686869809726 is 627908968686.

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

686869809726 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686869809727) 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, 57239150805 + ... + 57239150816.

It is an arithmetic number, because the mean of its divisors is an integer number (171717452433).

Almost surely, 2^686869809726 is an apocalyptic number.

686869809726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

686869809726 is a wasteful number, since it uses less digits than its factorization.

686869809726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114478301626.

The product of its (nonzero) digits is 752467968, while the sum is 75.

The spelling of 686869809726 in words is "six hundred eighty-six billion, eight hundred sixty-nine million, eight hundred nine thousand, seven hundred twenty-six".