67889812992 has 80 divisors (see below), whose sum is σ = 181453094592. Its totient is φ = 22556067840.

The previous prime is 67889812981. The next prime is 67889812999. The reversal of 67889812992 is 29921898876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67889812999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399567 + ... + 543537.

Almost surely, 2^67889812992 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 67889812992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90726547296).

67889812992 is an abundant number, since it is smaller than the sum of its proper divisors (113563281600).

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

67889812992 is a wasteful number, since it uses less digits than its factorization.

67889812992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144299 (or 144283 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 69.

The spelling of 67889812992 in words is "sixty-seven billion, eight hundred eighty-nine million, eight hundred twelve thousand, nine hundred ninety-two".