72768721728 has 28 divisors (see below), whose sum is σ = 192533910080. Its totient is φ = 24256240512.

The previous prime is 72768721723. The next prime is 72768721843. The reversal of 72768721728 is 82712786727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72768721723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189501688 + ... + 189502071.

Almost surely, 2^72768721728 is an apocalyptic number.

It is an amenable number.

72768721728 is an abundant number, since it is smaller than the sum of its proper divisors (119765188352).

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

72768721728 is a wasteful number, since it uses less digits than its factorization.

72768721728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379003774 (or 379003764 counting only the distinct ones).

The product of its digits is 7375872, while the sum is 57.

The spelling of 72768721728 in words is "seventy-two billion, seven hundred sixty-eight million, seven hundred twenty-one thousand, seven hundred twenty-eight".