686788298040 has 128 divisors (see below), whose sum is σ = 2246941670400. Its totient is φ = 166915607040.

The previous prime is 686788297997. The next prime is 686788298047. The reversal of 686788298040 is 40892887686.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686788298047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2663146 + ... + 2909625.

It is an arithmetic number, because the mean of its divisors is an integer number (17554231800).

Almost surely, 2^686788298040 is an apocalyptic number.

686788298040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686788298040 is an abundant number, since it is smaller than the sum of its proper divisors (1560153372360).

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

686788298040 is a wasteful number, since it uses less digits than its factorization.

686788298040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572877 (or 5572873 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 66.

The spelling of 686788298040 in words is "six hundred eighty-six billion, seven hundred eighty-eight million, two hundred ninety-eight thousand, forty".