685369532117 has 4 divisors (see below), whose sum is σ = 686509914636. Its totient is φ = 684229149600.

The previous prime is 685369532101. The next prime is 685369532129. The reversal of 685369532117 is 711235963586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711235963586 = 2 ⋅355617981793.

It can be written as a sum of positive squares in 2 ways, for example, as 268661842276 + 416707689841 = 518326^2 + 645529^2 .

It is a cyclic number.

It is not a de Polignac number, because 685369532117 - 2⁴ = 685369532101 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 (685369532417) 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 in 3 ways as a sum of consecutive naturals, for example, 570190358 + ... + 570191559.

It is an arithmetic number, because the mean of its divisors is an integer number (171627478659).

Almost surely, 2^685369532117 is an apocalyptic number.

It is an amenable number.

685369532117 is a deficient number, since it is larger than the sum of its proper divisors (1140382519).

685369532117 is a wasteful number, since it uses less digits than its factorization.

685369532117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140382518.

The product of its digits is 8164800, while the sum is 56.

The spelling of 685369532117 in words is "six hundred eighty-five billion, three hundred sixty-nine million, five hundred thirty-two thousand, one hundred seventeen".