686893662336 has 128 divisors (see below), whose sum is σ = 2100215577600. Its totient is φ = 194843317248.

The previous prime is 686893662293. The next prime is 686893662337. The reversal of 686893662336 is 633266398686.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (686893662337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545580 + ... + 1292843.

It is an arithmetic number, because the mean of its divisors is an integer number (16407934200).

Almost surely, 2^686893662336 is an apocalyptic number.

It is an amenable number.

686893662336 is an abundant number, since it is smaller than the sum of its proper divisors (1413321915264).

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

686893662336 is a wasteful number, since it uses less digits than its factorization.

686893662336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838586 (or 1838574 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 66.

The spelling of 686893662336 in words is "six hundred eighty-six billion, eight hundred ninety-three million, six hundred sixty-two thousand, three hundred thirty-six".