78687223616 has 112 divisors (see below), whose sum is σ = 165977011200. Its totient is φ = 36951552000.

The previous prime is 78687223613. The next prime is 78687223633. The reversal of 78687223616 is 61632278687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78687223613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16185026 + ... + 16189886.

It is an arithmetic number, because the mean of its divisors is an integer number (1481937600).

Almost surely, 2^78687223616 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 78687223616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82988505600).

78687223616 is an abundant number, since it is smaller than the sum of its proper divisors (87289787584).

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

78687223616 is a wasteful number, since it uses less digits than its factorization.

78687223616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144 (or 5134 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 56.

The spelling of 78687223616 in words is "seventy-eight billion, six hundred eighty-seven million, two hundred twenty-three thousand, six hundred sixteen".