67321965312 has 432 divisors, whose sum is σ = 230292508992. Its totient is φ = 18513100800.

The previous prime is 67321965311. The next prime is 67321965313. The reversal of 67321965312 is 21356912376.

67321965312 is a `hidden beast` number, since 6 + 7 + 3 + 21 + 96 + 531 + 2 = 666.

67321965312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (67321965311) and next prime (67321965313).

It is not an unprimeable number, because it can be changed into a prime (67321965311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60269778 + ... + 60270894.

Almost surely, 2^67321965312 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 67321965312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115146254496).

67321965312 is an abundant number, since it is smaller than the sum of its proper divisors (162970543680).

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

67321965312 is a wasteful number, since it uses less digits than its factorization.

67321965312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1267 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The spelling of 67321965312 in words is "sixty-seven billion, three hundred twenty-one million, nine hundred sixty-five thousand, three hundred twelve".