686860368192 has 140 divisors (see below), whose sum is σ = 2055838566496. Its totient is φ = 226730430720.

The previous prime is 686860368179. The next prime is 686860368197. The reversal of 686860368192 is 291863068686.

686860368192 is a `hidden beast` number, since 6 + 8 + 6 + 8 + 603 + 6 + 8 + 19 + 2 = 666.

It is a super-4 number, since 4×686860368192⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686860368197) 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 19 ways as a sum of consecutive naturals, for example, 109234 + ... + 1177137.

Almost surely, 2^686860368192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686860368192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027919283248).

686860368192 is an abundant number, since it is smaller than the sum of its proper divisors (1368978198304).

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

686860368192 is a wasteful number, since it uses less digits than its factorization.

686860368192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286498 (or 1286479 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 63.

The spelling of 686860368192 in words is "six hundred eighty-six billion, eight hundred sixty million, three hundred sixty-eight thousand, one hundred ninety-two".