686146056215 has 16 divisors (see below), whose sum is σ = 852353992800. Its totient is φ = 529623760512.

The previous prime is 686146056203. The next prime is 686146056229. The reversal of 686146056215 is 512650641686.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 686146056215 - 2⁶ = 686146056151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417685 + ... + 1839054.

It is an arithmetic number, because the mean of its divisors is an integer number (53272124550).

Almost surely, 2^686146056215 is an apocalyptic number.

686146056215 is a deficient number, since it is larger than the sum of its proper divisors (166207936585).

686146056215 is a wasteful number, since it uses less digits than its factorization.

686146056215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258226.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 686146056215 in words is "six hundred eighty-six billion, one hundred forty-six million, fifty-six thousand, two hundred fifteen".