686105026741 has 2 divisors, whose sum is σ = 686105026742. Its totient is φ = 686105026740.

The previous prime is 686105026697. The next prime is 686105026801. The reversal of 686105026741 is 147620501686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665807040900 + 20297985841 = 815970^2 + 142471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686105026741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686105026691 and 686105026700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686105024741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343052513370 + 343052513371.

It is an arithmetic number, because the mean of its divisors is an integer number (343052513371).

Almost surely, 2^686105026741 is an apocalyptic number.

It is an amenable number.

686105026741 is a deficient number, since it is larger than the sum of its proper divisors (1).

686105026741 is an equidigital number, since it uses as much as digits as its factorization.

686105026741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 686105026741 in words is "six hundred eighty-six billion, one hundred five million, twenty-six thousand, seven hundred forty-one".