67281269792 has 72 divisors (see below), whose sum is σ = 146016643500. Its totient is φ = 30494154240.

The previous prime is 67281269791. The next prime is 67281269827. The reversal of 67281269792 is 29796218276.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67186713616 + 94556176 = 259204^2 + 9724^2 .

It is not an unprimeable number, because it can be changed into a prime (67281269791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1326434 + ... + 1376222.

Almost surely, 2^67281269792 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 67281269792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73008321750).

67281269792 is an abundant number, since it is smaller than the sum of its proper divisors (78735373708).

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

67281269792 is a wasteful number, since it uses less digits than its factorization.

67281269792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50170 (or 50151 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 59.

The spelling of 67281269792 in words is "sixty-seven billion, two hundred eighty-one million, two hundred sixty-nine thousand, seven hundred ninety-two".