72809257599 has 48 divisors (see below), whose sum is σ = 117437931520. Its totient is φ = 43165431360.

The previous prime is 72809257589. The next prime is 72809257663. The reversal of 72809257599 is 99575290827.

It is not a de Polignac number, because 72809257599 - 2⁴ = 72809257583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72809257519) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 763812 + ... + 853830.

Almost surely, 2^72809257599 is an apocalyptic number.

72809257599 is a deficient number, since it is larger than the sum of its proper divisors (44628673921).

72809257599 is a wasteful number, since it uses less digits than its factorization.

72809257599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90292 (or 90289 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 63.

The spelling of 72809257599 in words is "seventy-two billion, eight hundred nine million, two hundred fifty-seven thousand, five hundred ninety-nine".