79887888878898 has 8 divisors (see below), whose sum is σ = 159775777757808. Its totient is φ = 26629296292964.

The previous prime is 79887888878867. The next prime is 79887888878939. The reversal of 79887888878898 is 89887888878897.

It is a sphenic number, since it is the product of 3 distinct primes.

79887888878898 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 79887888878793 and 79887888878802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6657324073236 + ... + 6657324073247.

It is an arithmetic number, because the mean of its divisors is an integer number (19971972219726).

Almost surely, 2^{79887888878898} is an apocalyptic number.

79887888878898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

79887888878898 is a wasteful number, since it uses less digits than its factorization.

79887888878898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13314648146488.

The product of its digits is 3728971137024, while the sum is 111.

Subtracting 79887888878898 from its reverse (89887888878897), we obtain a palindrome (9999999999999).

The spelling of 79887888878898 in words is "seventy-nine trillion, eight hundred eighty-seven billion, eight hundred eighty-eight million, eight hundred seventy-eight thousand, eight hundred ninety-eight".