79778278848 has 112 divisors (see below), whose sum is σ = 212980649984. Its totient is φ = 26353797120.

The previous prime is 79778278847. The next prime is 79778278897. The reversal of 79778278848 is 84887287797.

It is a self number, because there is not a number n which added to its sum of digits gives 79778278848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79778278841) 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, 37330836 + ... + 37332972.

Almost surely, 2^79778278848 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 79778278848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106490324992).

79778278848 is an abundant number, since it is smaller than the sum of its proper divisors (133202371136).

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

79778278848 is a wasteful number, since it uses less digits than its factorization.

79778278848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810 (or 3800 counting only the distinct ones).

The product of its digits is 708083712, while the sum is 75.

The spelling of 79778278848 in words is "seventy-nine billion, seven hundred seventy-eight million, two hundred seventy-eight thousand, eight hundred forty-eight".