685950682693 has 8 divisors (see below), whose sum is σ = 714366603000. Its totient is φ = 657852259008.

The previous prime is 685950682657. The next prime is 685950682723. The reversal of 685950682693 is 396286059586.

It can be written as a sum of positive squares in 4 ways, for example, as 11348001729 + 674602680964 = 106527^2 + 821342^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685950682693 - 2⁹ = 685950682181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685950682603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79369746 + ... + 79378387.

It is an arithmetic number, because the mean of its divisors is an integer number (89295825375).

Almost surely, 2^685950682693 is an apocalyptic number.

It is an amenable number.

685950682693 is a deficient number, since it is larger than the sum of its proper divisors (28415920307).

685950682693 is a wasteful number, since it uses less digits than its factorization.

685950682693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158748311.

The product of its (nonzero) digits is 167961600, while the sum is 67.

The spelling of 685950682693 in words is "six hundred eighty-five billion, nine hundred fifty million, six hundred eighty-two thousand, six hundred ninety-three".