78319216176 has 80 divisors (see below), whose sum is σ = 211210053120. Its totient is φ = 24960855040.

The previous prime is 78319216169. The next prime is 78319216193. The reversal of 78319216176 is 67161291387.

It is a happy number.

It is a super-2 number, since 2×78319216176² (a number of 23 digits) contains 22 as substring.

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, 2866741 + ... + 2893931.

It is an arithmetic number, because the mean of its divisors is an integer number (2640125664).

Almost surely, 2^78319216176 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 78319216176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105605026560).

78319216176 is an abundant number, since it is smaller than the sum of its proper divisors (132890836944).

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

78319216176 is a wasteful number, since it uses less digits than its factorization.

78319216176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29834 (or 29828 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The spelling of 78319216176 in words is "seventy-eight billion, three hundred nineteen million, two hundred sixteen thousand, one hundred seventy-six".