685000486639 has 16 divisors (see below), whose sum is σ = 791182986048. Its totient is φ = 580903206912.

The previous prime is 685000486631. The next prime is 685000486741. The reversal of 685000486639 is 936684000586.

It is a happy number.

It is not a de Polignac number, because 685000486639 - 2³ = 685000486631 is a prime.

It is a super-3 number, since 3×685000486639³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685000486639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685000486631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969227 + ... + 2290819.

It is an arithmetic number, because the mean of its divisors is an integer number (49448936628).

Almost surely, 2^685000486639 is an apocalyptic number.

685000486639 is a deficient number, since it is larger than the sum of its proper divisors (106182499409).

685000486639 is a wasteful number, since it uses less digits than its factorization.

685000486639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324834.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 685000486639 in words is "six hundred eighty-five billion, four hundred eighty-six thousand, six hundred thirty-nine".