72389064209 has 18 divisors (see below), whose sum is σ = 92558870082. Its totient is φ = 56407058400.

The previous prime is 72389064203. The next prime is 72389064211. The reversal of 72389064209 is 90246098327.

It can be written as a sum of positive squares in only one way, i.e., 69998343184 + 2390721025 = 264572^2 + 48895^2 .

It is not a de Polignac number, because 72389064209 - 2¹⁶ = 72388998673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72389064203) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6098732 + ... + 6110589.

It is an arithmetic number, because the mean of its divisors is an integer number (5142159449).

Almost surely, 2^72389064209 is an apocalyptic number.

It is an amenable number.

72389064209 is a deficient number, since it is larger than the sum of its proper divisors (20169805873).

72389064209 is a wasteful number, since it uses less digits than its factorization.

72389064209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12209357 (or 12209339 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 72389064209 in words is "seventy-two billion, three hundred eighty-nine million, sixty-four thousand, two hundred nine".