686838841960 has 16 divisors (see below), whose sum is σ = 1545387394500. Its totient is φ = 274735536768.

The previous prime is 686838841919. The next prime is 686838841963. The reversal of 686838841960 is 69148838686.

It can be written as a sum of positive squares in 2 ways, for example, as 562347010404 + 124491831556 = 749898^2 + 352834^2 .

It is not an unprimeable number, because it can be changed into a prime (686838841963) 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, 8585485485 + ... + 8585485564.

Almost surely, 2^686838841960 is an apocalyptic number.

It is an amenable number.

686838841960 is an abundant number, since it is smaller than the sum of its proper divisors (858548552540).

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

686838841960 is a wasteful number, since it uses less digits than its factorization.

686838841960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17170971060 (or 17170971056 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 67.

The spelling of 686838841960 in words is "six hundred eighty-six billion, eight hundred thirty-eight million, eight hundred forty-one thousand, nine hundred sixty".