686106906504 has 32 divisors (see below), whose sum is σ = 1805544492000. Its totient is φ = 216665338752.

The previous prime is 686106906479. The next prime is 686106906557. The reversal of 686106906504 is 405609601686.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752309749 + ... + 752310660.

It is an arithmetic number, because the mean of its divisors is an integer number (56423265375).

Almost surely, 2^686106906504 is an apocalyptic number.

It is an amenable number.

686106906504 is an abundant number, since it is smaller than the sum of its proper divisors (1119437585496).

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

686106906504 is a wasteful number, since it uses less digits than its factorization.

686106906504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504620437 (or 1504620433 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 686106906504 in words is "six hundred eighty-six billion, one hundred six million, nine hundred six thousand, five hundred four".