789668685720 has 640 divisors, whose sum is σ = 2975066107200. Its totient is φ = 186890747904.

The previous prime is 789668685719. The next prime is 789668685731. The reversal of 789668685720 is 27586866987.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 68679012 + ... + 68690508.

Almost surely, 2^789668685720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 789668685720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487533053600).

789668685720 is an abundant number, since it is smaller than the sum of its proper divisors (2185397421480).

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

789668685720 is a wasteful number, since it uses less digits than its factorization.

789668685720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11609 (or 11596 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 72.

The spelling of 789668685720 in words is "seven hundred eighty-nine billion, six hundred sixty-eight million, six hundred eighty-five thousand, seven hundred twenty".