79989656989632 has 448 divisors, whose sum is σ = 232866847309824. Its totient is φ = 24084239155200.

The previous prime is 79989656989621. The next prime is 79989656989633. The reversal of 79989656989632 is 23698965698997.

It is a Harshad number since it is a multiple of its sum of digits (96).

It is a self number, because there is not a number n which added to its sum of digits gives 79989656989632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79989656989633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18443543368 + ... + 18443547704.

It is an arithmetic number, because the mean of its divisors is an integer number (519792069888).

Almost surely, 2^{79989656989632} 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 79989656989632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116433423654912).

79989656989632 is an abundant number, since it is smaller than the sum of its proper divisors (152877190320192).

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

79989656989632 is a wasteful number, since it uses less digits than its factorization.

79989656989632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276 (or 5266 counting only the distinct ones).

The product of its digits is 171421608960, while the sum is 96.

The spelling of 79989656989632 in words is "seventy-nine trillion, nine hundred eighty-nine billion, six hundred fifty-six million, nine hundred eighty-nine thousand, six hundred thirty-two".