72072514538 has 8 divisors (see below), whose sum is σ = 111836660580. Its totient is φ = 34793627680.

The previous prime is 72072514523. The next prime is 72072514559. The reversal of 72072514538 is 83541527027.

It can be written as a sum of positive squares in 2 ways, for example, as 68603657929 + 3468856609 = 261923^2 + 58897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621314723 + ... + 621314838.

Almost surely, 2^72072514538 is an apocalyptic number.

72072514538 is a deficient number, since it is larger than the sum of its proper divisors (39764146042).

72072514538 is a wasteful number, since it uses less digits than its factorization.

72072514538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242629592.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 72072514538 in words is "seventy-two billion, seventy-two million, five hundred fourteen thousand, five hundred thirty-eight".