72708607128 has 32 divisors (see below), whose sum is σ = 182694227760. Its totient is φ = 24113174400.

The previous prime is 72708607091. The next prime is 72708607129. The reversal of 72708607128 is 82170680727.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72708607129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7684423 + ... + 7693878.

Almost surely, 2^72708607128 is an apocalyptic number.

It is an amenable number.

72708607128 is an abundant number, since it is smaller than the sum of its proper divisors (109985620632).

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

72708607128 is a wasteful number, since it uses less digits than its factorization.

72708607128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15378507 (or 15378503 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 72708607128 in words is "seventy-two billion, seven hundred eight million, six hundred seven thousand, one hundred twenty-eight".