67642889328 has 240 divisors, whose sum is σ = 224224505856. Its totient is φ = 18628116480.

The previous prime is 67642889257. The next prime is 67642889339. The reversal of 67642889328 is 82398824676.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8026525 + ... + 8034947.

Almost surely, 2^67642889328 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 67642889328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112112252928).

67642889328 is an abundant number, since it is smaller than the sum of its proper divisors (156581616528).

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

67642889328 is a wasteful number, since it uses less digits than its factorization.

67642889328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8732 (or 8723 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 67642889328 in words is "sixty-seven billion, six hundred forty-two million, eight hundred eighty-nine thousand, three hundred twenty-eight".