78841669712 has 80 divisors (see below), whose sum is σ = 166651500288. Its totient is φ = 35916272640.

The previous prime is 78841669703. The next prime is 78841669741. The reversal of 78841669712 is 21796614887.

It is a congruent number.

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, 6656948 + ... + 6668780.

Almost surely, 2^78841669712 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 78841669712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83325750144).

78841669712 is an abundant number, since it is smaller than the sum of its proper divisors (87809830576).

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

78841669712 is a wasteful number, since it uses less digits than its factorization.

78841669712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12268 (or 12262 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 59.

The spelling of 78841669712 in words is "seventy-eight billion, eight hundred forty-one million, six hundred sixty-nine thousand, seven hundred twelve".