78673615872 has 88 divisors (see below), whose sum is σ = 209778623376. Its totient is φ = 26213941248.

The previous prime is 78673615847. The next prime is 78673615877. The reversal of 78673615872 is 27851637687.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78673615877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12570568 + ... + 12576824.

Almost surely, 2^78673615872 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 78673615872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104889311688).

78673615872 is an abundant number, since it is smaller than the sum of its proper divisors (131105007504).

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

78673615872 is a wasteful number, since it uses less digits than its factorization.

78673615872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373 (or 10355 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 60.

The spelling of 78673615872 in words is "seventy-eight billion, six hundred seventy-three million, six hundred fifteen thousand, eight hundred seventy-two".