79887888878896 has 80 divisors (see below), whose sum is σ = 178419906466560. Its totient is φ = 33942961278720.

The previous prime is 79887888878867. The next prime is 79887888878939. The reversal of 79887888878896 is 69887888878897.

It is a junction number, because it is equal to n+sod(n) for n = 79887888878792 and 79887888878801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12279070 + ... + 17622466.

It is an arithmetic number, because the mean of its divisors is an integer number (2230248830832).

Almost surely, 2^{79887888878896} 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 79887888878896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89209953233280).

79887888878896 is an abundant number, since it is smaller than the sum of its proper divisors (98532017587664).

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

79887888878896 is a wasteful number, since it uses less digits than its factorization.

79887888878896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344562 (or 5344556 counting only the distinct ones).

The product of its digits is 2796728352768, while the sum is 109.

Subtracting from 79887888878896 its reverse (69887888878897), we obtain a palindrome (9999999999999).

The spelling of 79887888878896 in words is "seventy-nine trillion, eight hundred eighty-seven billion, eight hundred eighty-eight million, eight hundred seventy-eight thousand, eight hundred ninety-six".