79998000000 has 448 divisors, whose sum is σ = 270934032000. Its totient is φ = 20908800000.

The previous prime is 79997999987. The next prime is 79998000001. The reversal of 79998000000 is 89997.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79998000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 401999901 + ... + 402000099.

Almost surely, 2^79998000000 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 79998000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135467016000).

79998000000 is an abundant number, since it is smaller than the sum of its proper divisors (190936032000).

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

79998000000 is an frugal number, since it uses more digits than its factorization.

79998000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 42.

Adding to 79998000000 its reverse (89997), we get a palindrome (79998089997).

The spelling of 79998000000 in words is "seventy-nine billion, nine hundred ninety-eight million", and thus it is an aban number.