79845663636480 has 704 divisors, whose sum is σ = 299997420134400. Its totient is φ = 18117058756608.

The previous prime is 79845663636461. The next prime is 79845663636521. The reversal of 79845663636480 is 8463636654897.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 721726449 + ... + 721837071.

Almost surely, 2^{79845663636480} is an apocalyptic number.

79845663636480 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79845663636480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149998710067200).

79845663636480 is an abundant number, since it is smaller than the sum of its proper divisors (220151756497920).

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

79845663636480 is a wasteful number, since it uses less digits than its factorization.

79845663636480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110809 (or 110777 counting only the distinct ones).

The product of its (nonzero) digits is 3762339840, while the sum is 75.

The spelling of 79845663636480 in words is "seventy-nine trillion, eight hundred forty-five billion, six hundred sixty-three million, six hundred thirty-six thousand, four hundred eighty".