686405028653 has 2 divisors, whose sum is σ = 686405028654. Its totient is φ = 686405028652.

The previous prime is 686405028643. The next prime is 686405028667. The reversal of 686405028653 is 356820504686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620192475529 + 66212553124 = 787523^2 + 257318^2 .

It is a cyclic number.

It is not a de Polignac number, because 686405028653 - 2¹⁰ = 686405027629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686405028595 and 686405028604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686405028643) by changing a digit.

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 as a sum of consecutive naturals, namely, 343202514326 + 343202514327.

It is an arithmetic number, because the mean of its divisors is an integer number (343202514327).

Almost surely, 2^686405028653 is an apocalyptic number.

It is an amenable number.

686405028653 is a deficient number, since it is larger than the sum of its proper divisors (1).

686405028653 is an equidigital number, since it uses as much as digits as its factorization.

686405028653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 686405028653 in words is "six hundred eighty-six billion, four hundred five million, twenty-eight thousand, six hundred fifty-three".