79990074816 has 112 divisors (see below), whose sum is σ = 212615556480. Its totient is φ = 26540846080.

The previous prime is 79990074811. The next prime is 79990074817. The reversal of 79990074816 is 61847009997.

It is a self number, because there is not a number n which added to its sum of digits gives 79990074816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79990074811) 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, 47983615 + ... + 47985281.

Almost surely, 2^79990074816 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 79990074816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106307778240).

79990074816 is an abundant number, since it is smaller than the sum of its proper divisors (132625481664).

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

79990074816 is a wasteful number, since it uses less digits than its factorization.

79990074816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682 (or 2672 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 60.

The spelling of 79990074816 in words is "seventy-nine billion, nine hundred ninety million, seventy-four thousand, eight hundred sixteen".