78645384916 has 24 divisors (see below), whose sum is σ = 157299299136. Its totient is φ = 33703337280.

The previous prime is 78645384901. The next prime is 78645385001. The reversal of 78645384916 is 61948354687.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535656 + ... + 666496.

It is an arithmetic number, because the mean of its divisors is an integer number (6554137464).

Almost surely, 2^78645384916 is an apocalyptic number.

It is an amenable number.

78645384916 is an abundant number, since it is smaller than the sum of its proper divisors (78653914220).

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

78645384916 is a wasteful number, since it uses less digits than its factorization.

78645384916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152319 (or 152317 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 61.

The spelling of 78645384916 in words is "seventy-eight billion, six hundred forty-five million, three hundred eighty-four thousand, nine hundred sixteen".