686580510438 has 20 divisors (see below), whose sum is σ = 1538448921900. Its totient is φ = 228860170092.

The previous prime is 686580510437. The next prime is 686580510503. The reversal of 686580510438 is 834015085686.

686580510438 is a `hidden beast` number, since 6 + 8 + 6 + 5 + 80 + 510 + 43 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686580510437) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2119075488 + ... + 2119075811.

It is an arithmetic number, because the mean of its divisors is an integer number (76922446095).

Almost surely, 2^686580510438 is an apocalyptic number.

686580510438 is an abundant number, since it is smaller than the sum of its proper divisors (851868411462).

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

686580510438 is a wasteful number, since it uses less digits than its factorization.

686580510438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238151313 (or 4238151304 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 686580510438 in words is "six hundred eighty-six billion, five hundred eighty million, five hundred ten thousand, four hundred thirty-eight".