67783281384 has 512 divisors, whose sum is σ = 222953472000. Its totient is φ = 16697318400.

The previous prime is 67783281343. The next prime is 67783281407. The reversal of 67783281384 is 48318238776.

It is a happy number.

67783281384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 283611937 + ... + 283612175.

It is an arithmetic number, because the mean of its divisors is an integer number (435456000).

Almost surely, 2^67783281384 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 67783281384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111476736000).

67783281384 is an abundant number, since it is smaller than the sum of its proper divisors (155170190616).

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

67783281384 is a wasteful number, since it uses less digits than its factorization.

67783281384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 425 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 57.

The spelling of 67783281384 in words is "sixty-seven billion, seven hundred eighty-three million, two hundred eighty-one thousand, three hundred eighty-four".