72365846009 has 4 divisors (see below), whose sum is σ = 72374421504. Its totient is φ = 72357270516.

The previous prime is 72365845961. The next prime is 72365846011. The reversal of 72365846009 is 90064856327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72365846009 - 2²⁴ = 72349068793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72365846909) 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, 4275077 + ... + 4291970.

It is an arithmetic number, because the mean of its divisors is an integer number (18093605376).

Almost surely, 2^72365846009 is an apocalyptic number.

It is an amenable number.

72365846009 is a deficient number, since it is larger than the sum of its proper divisors (8575495).

72365846009 is an equidigital number, since it uses as much as digits as its factorization.

72365846009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8575494.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 72365846009 in words is "seventy-two billion, three hundred sixty-five million, eight hundred forty-six thousand, nine".