72239525408 has 18 divisors (see below), whose sum is σ = 142224559029. Its totient is φ = 36119002496.

The previous prime is 72239525359. The next prime is 72239525417. The reversal of 72239525408 is 80452593227.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 66178591504 + 6060933904 = 257252^2 + 77852^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=190052.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 1496660 + ... + 1544172.

Almost surely, 2^72239525408 is an apocalyptic number.

It is an amenable number.

72239525408 is a deficient number, since it is larger than the sum of its proper divisors (69985033621).

72239525408 is an frugal number, since it uses more digits than its factorization.

72239525408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95036 (or 47515 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 72239525408 in words is "seventy-two billion, two hundred thirty-nine million, five hundred twenty-five thousand, four hundred eight".