72381733309 has 8 divisors (see below), whose sum is σ = 79503963840. Its totient is φ = 65590769376.

The previous prime is 72381733261. The next prime is 72381733321. The reversal of 72381733309 is 90333718327.

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

It is a cyclic number.

It is not a de Polignac number, because 72381733309 - 2⁷ = 72381733181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72381733339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82816192 + ... + 82817065.

It is an arithmetic number, because the mean of its divisors is an integer number (9937995480).

Almost surely, 2^72381733309 is an apocalyptic number.

It is an amenable number.

72381733309 is a deficient number, since it is larger than the sum of its proper divisors (7122230531).

72381733309 is a wasteful number, since it uses less digits than its factorization.

72381733309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165633299.

The product of its (nonzero) digits is 571536, while the sum is 46.

The spelling of 72381733309 in words is "seventy-two billion, three hundred eighty-one million, seven hundred thirty-three thousand, three hundred nine".