67235401728 has 728 divisors, whose sum is σ = 232055616960. Its totient is φ = 19269550080.

The previous prime is 67235401721. The next prime is 67235401733. The reversal of 67235401728 is 82710453276.

67235401728 is a `hidden beast` number, since 6 + 7 + 235 + 401 + 7 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67235401721) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 755453908 + ... + 755453996.

Almost surely, 2^67235401728 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 67235401728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116027808480).

67235401728 is an abundant number, since it is smaller than the sum of its proper divisors (164820215232).

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

67235401728 is an equidigital number, since it uses as much as digits as its factorization.

67235401728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 67235401728 in words is "sixty-seven billion, two hundred thirty-five million, four hundred one thousand, seven hundred twenty-eight".