684864409000 has 64 divisors (see below), whose sum is σ = 1606284847440. Its totient is φ = 273312921600.

The previous prime is 684864408979. The next prime is 684864409039. The reversal of 684864409000 is 904468486.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 46843676356 + 638020732644 = 216434^2 + 798762^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357837 + ... + 1223836.

Almost surely, 2^684864409000 is an apocalyptic number.

It is an amenable number.

684864409000 is an abundant number, since it is smaller than the sum of its proper divisors (921420438440).

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

684864409000 is a wasteful number, since it uses less digits than its factorization.

684864409000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582127 (or 1582113 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 684864409000 in words is "six hundred eighty-four billion, eight hundred sixty-four million, four hundred nine thousand".