686291445271 has 2 divisors, whose sum is σ = 686291445272. Its totient is φ = 686291445270.

The previous prime is 686291445251. The next prime is 686291445331. The reversal of 686291445271 is 172544192686.

686291445271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686291445271 - 2³¹ = 684143961623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686291445211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343145722635 + 343145722636.

It is an arithmetic number, because the mean of its divisors is an integer number (343145722636).

Almost surely, 2^686291445271 is an apocalyptic number.

686291445271 is a deficient number, since it is larger than the sum of its proper divisors (1).

686291445271 is an equidigital number, since it uses as much as digits as its factorization.

686291445271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The spelling of 686291445271 in words is "six hundred eighty-six billion, two hundred ninety-one million, four hundred forty-five thousand, two hundred seventy-one".