686760731420 has 12 divisors (see below), whose sum is σ = 1442197536024. Its totient is φ = 274704292560.

The previous prime is 686760731417. The next prime is 686760731429. The reversal of 686760731420 is 24137067686.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686760731429) 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, 17169018266 + ... + 17169018305.

It is an arithmetic number, because the mean of its divisors is an integer number (120183128002).

Almost surely, 2^686760731420 is an apocalyptic number.

It is an amenable number.

686760731420 is an abundant number, since it is smaller than the sum of its proper divisors (755436804604).

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

686760731420 is a wasteful number, since it uses less digits than its factorization.

686760731420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34338036580 (or 34338036578 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 686760731420 in words is "six hundred eighty-six billion, seven hundred sixty million, seven hundred thirty-one thousand, four hundred twenty".