79900169888 has 144 divisors (see below), whose sum is σ = 206505482400. Its totient is φ = 30056302080.

The previous prime is 79900169879. The next prime is 79900169893. The reversal of 79900169888 is 88896100997.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 420323 + ... + 580061.

It is an arithmetic number, because the mean of its divisors is an integer number (1434065850).

Almost surely, 2^79900169888 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 79900169888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103252741200).

79900169888 is an abundant number, since it is smaller than the sum of its proper divisors (126605312512).

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

79900169888 is a wasteful number, since it uses less digits than its factorization.

79900169888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159803 (or 159788 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 65.

The spelling of 79900169888 in words is "seventy-nine billion, nine hundred million, one hundred sixty-nine thousand, eight hundred eighty-eight".