686172212307 has 8 divisors (see below), whose sum is σ = 1016551425680. Its totient is φ = 457448141520.

The previous prime is 686172212293. The next prime is 686172212311. The reversal of 686172212307 is 703212271686.

686172212307 is a `hidden beast` number, since 6 + 8 + 61 + 72 + 212 + 307 = 666.

It is not a de Polignac number, because 686172212307 - 2⁴ = 686172212291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686172212207) 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 7 ways as a sum of consecutive naturals, for example, 12706892794 + ... + 12706892847.

It is an arithmetic number, because the mean of its divisors is an integer number (127068928210).

Almost surely, 2^686172212307 is an apocalyptic number.

686172212307 is a deficient number, since it is larger than the sum of its proper divisors (330379213373).

686172212307 is a wasteful number, since it uses less digits than its factorization.

686172212307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25413785650 (or 25413785644 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 686172212307 in words is "six hundred eighty-six billion, one hundred seventy-two million, two hundred twelve thousand, three hundred seven".