684444750009 has 8 divisors (see below), whose sum is σ = 937257675840. Its totient is φ = 443964162096.

The previous prime is 684444750001. The next prime is 684444750089. The reversal of 684444750009 is 900057444486.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 684444750009 - 2³ = 684444750001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684444750001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3083084349 + ... + 3083084570.

It is an arithmetic number, because the mean of its divisors is an integer number (117157209480).

Almost surely, 2^684444750009 is an apocalyptic number.

It is an amenable number.

684444750009 is a deficient number, since it is larger than the sum of its proper divisors (252812925831).

684444750009 is a wasteful number, since it uses less digits than its factorization.

684444750009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6166168959.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 684444750009 in words is "six hundred eighty-four billion, four hundred forty-four million, seven hundred fifty thousand, nine".