79444878912 has 168 divisors, whose sum is σ = 262773054336. Its totient is φ = 22478045184.

The previous prime is 79444878901. The next prime is 79444878937. The reversal of 79444878912 is 21987844497.

79444878912 is a `hidden beast` number, since 79 + 4 + 4 + 487 + 89 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×79444878912² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 79444878912.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319648 + ... + 510944.

Almost surely, 2^79444878912 is an apocalyptic number.

79444878912 is a gapful number since it is divisible by the number (72) 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 79444878912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131386527168).

79444878912 is an abundant number, since it is smaller than the sum of its proper divisors (183328175424).

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

79444878912 is a wasteful number, since it uses less digits than its factorization.

79444878912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191425 (or 191412 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 79444878912 in words is "seventy-nine billion, four hundred forty-four million, eight hundred seventy-eight thousand, nine hundred twelve".