686516125 has 16 divisors (see below), whose sum is σ = 861928704. Its totient is φ = 545907600.

The previous prime is 686516119. The next prime is 686516137. The reversal of 686516125 is 521615686.

It is not a de Polignac number, because 686516125 - 2²³ = 678127517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4432 + ... + 37318.

It is an arithmetic number, because the mean of its divisors is an integer number (53870544).

Almost surely, 2^686516125 is an apocalyptic number.

It is an amenable number.

686516125 is a deficient number, since it is larger than the sum of its proper divisors (175412579).

686516125 is a wasteful number, since it uses less digits than its factorization.

686516125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33069 (or 33059 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 686516125 is about 26201.4527269005. The cubic root of 686516125 is about 882.1658620480.

The spelling of 686516125 in words is "six hundred eighty-six million, five hundred sixteen thousand, one hundred twenty-five".