685042858663 has 4 divisors (see below), whose sum is σ = 686272738680. Its totient is φ = 683812978648.

The previous prime is 685042858613. The next prime is 685042858673. The reversal of 685042858663 is 366858240586.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685042858663 - 2⁹ = 685042858151 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 (685042858613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614939173 + ... + 614940286.

It is an arithmetic number, because the mean of its divisors is an integer number (171568184670).

Almost surely, 2^685042858663 is an apocalyptic number.

685042858663 is a deficient number, since it is larger than the sum of its proper divisors (1229880017).

685042858663 is a wasteful number, since it uses less digits than its factorization.

685042858663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229880016.

The product of its (nonzero) digits is 66355200, while the sum is 61.

The spelling of 685042858663 in words is "six hundred eighty-five billion, forty-two million, eight hundred fifty-eight thousand, six hundred sixty-three".