67979878912 has 80 divisors (see below), whose sum is σ = 148323444192. Its totient is φ = 30868971520.

The previous prime is 67979878909. The next prime is 67979878913. The reversal of 67979878912 is 21987897976.

It is not an unprimeable number, because it can be changed into a prime (67979878913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6172803 + ... + 6183805.

Almost surely, 2^67979878912 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 67979878912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74161722096).

67979878912 is an abundant number, since it is smaller than the sum of its proper divisors (80343565280).

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

67979878912 is a wasteful number, since it uses less digits than its factorization.

67979878912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12129 (or 12113 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 73.

It can be divided in two parts, 67 and 979878912, that added together give a palindrome (979878979).

The spelling of 67979878912 in words is "sixty-seven billion, nine hundred seventy-nine million, eight hundred seventy-eight thousand, nine hundred twelve".