79865118720 has 816 divisors, whose sum is σ = 309159789120. Its totient is φ = 19704840192.

The previous prime is 79865118709. The next prime is 79865118763. The reversal of 79865118720 is 2781156897.

It is a tau number, because it is divible by the number of its divisors (816).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1353646051 + ... + 1353646109.

Almost surely, 2^79865118720 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 79865118720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154579894560).

79865118720 is an abundant number, since it is smaller than the sum of its proper divisors (229294670400).

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

79865118720 is an frugal number, since it uses more digits than its factorization.

79865118720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 79865118720 in words is "seventy-nine billion, eight hundred sixty-five million, one hundred eighteen thousand, seven hundred twenty".