686064329971 has 2 divisors, whose sum is σ = 686064329972. Its totient is φ = 686064329970.

The previous prime is 686064329939. The next prime is 686064330019. The reversal of 686064329971 is 179923460686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686064329971 - 2⁵ = 686064329939 is a prime.

It is not a weakly prime, because it can be changed into another prime (686064329371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343032164985 + 343032164986.

It is an arithmetic number, because the mean of its divisors is an integer number (343032164986).

Almost surely, 2^686064329971 is an apocalyptic number.

686064329971 is a deficient number, since it is larger than the sum of its proper divisors (1).

686064329971 is an equidigital number, since it uses as much as digits as its factorization.

686064329971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 686064329971 in words is "six hundred eighty-six billion, sixty-four million, three hundred twenty-nine thousand, nine hundred seventy-one".