79912872320 has 128 divisors (see below), whose sum is σ = 197513208000. Its totient is φ = 30893875200.

The previous prime is 79912872289. The next prime is 79912872329. The reversal of 79912872320 is 2327821997.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79912872329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564506 + ... + 3586854.

Almost surely, 2^79912872320 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 79912872320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98756604000).

79912872320 is an abundant number, since it is smaller than the sum of its proper divisors (117600335680).

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

79912872320 is a wasteful number, since it uses less digits than its factorization.

79912872320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22556 (or 22544 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 79912872320 in words is "seventy-nine billion, nine hundred twelve million, eight hundred seventy-two thousand, three hundred twenty".