685000486640 has 40 divisors (see below), whose sum is σ = 1596597842448. Its totient is φ = 273316889600.

The previous prime is 685000486631. The next prime is 685000486741. The reversal of 685000486640 is 46684000586.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10644362 + ... + 10708521.

Almost surely, 2^685000486640 is an apocalyptic number.

It is an amenable number.

685000486640 is an abundant number, since it is smaller than the sum of its proper divisors (911597355808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685000486640 is a wasteful number, since it uses less digits than its factorization.

685000486640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21353297 (or 21353291 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 685000486640 in words is "six hundred eighty-five billion, four hundred eighty-six thousand, six hundred forty".