685536038713 has 2 divisors, whose sum is σ = 685536038714. Its totient is φ = 685536038712.

The previous prime is 685536038659. The next prime is 685536038827. The reversal of 685536038713 is 317830635586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 578167099129 + 107368939584 = 760373^2 + 327672^2 .

It is a cyclic number.

It is not a de Polignac number, because 685536038713 - 2²⁵ = 685502484281 is a prime.

It is not a weakly prime, because it can be changed into another prime (685536033713) 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, 342768019356 + 342768019357.

It is an arithmetic number, because the mean of its divisors is an integer number (342768019357).

Almost surely, 2^685536038713 is an apocalyptic number.

It is an amenable number.

685536038713 is a deficient number, since it is larger than the sum of its proper divisors (1).

685536038713 is an equidigital number, since it uses as much as digits as its factorization.

685536038713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 685536038713 in words is "six hundred eighty-five billion, five hundred thirty-six million, thirty-eight thousand, seven hundred thirteen".