79889898898 has 8 divisors (see below), whose sum is σ = 121021332300. Its totient is φ = 39549454800.

The previous prime is 79889898887. The next prime is 79889898931. The reversal of 79889898898 is 89889898897.

It can be written as a sum of positive squares in 2 ways, for example, as 76630973329 + 3258925569 = 276823^2 + 57087^2 .

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

It is a super-2 number, since 2×79889898898² (a number of 23 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 197747073 + ... + 197747476.

Almost surely, 2^79889898898 is an apocalyptic number.

79889898898 is a deficient number, since it is larger than the sum of its proper divisors (41131433402).

79889898898 is a wasteful number, since it uses less digits than its factorization.

79889898898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395494652.

The product of its digits is 12039487488, while the sum is 91.

Subtracting 79889898898 from its reverse (89889898897), we obtain a palindrome (9999999999).

The spelling of 79889898898 in words is "seventy-nine billion, eight hundred eighty-nine million, eight hundred ninety-eight thousand, eight hundred ninety-eight".