72433779589 has 2 divisors, whose sum is σ = 72433779590. Its totient is φ = 72433779588.

The previous prime is 72433779581. The next prime is 72433779617. The reversal of 72433779589 is 98597733427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70748020225 + 1685759364 = 265985^2 + 41058^2 .

It is an emirp because it is prime and its reverse (98597733427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72433779589 - 2³ = 72433779581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72433779589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72433779581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36216889794 + 36216889795.

It is an arithmetic number, because the mean of its divisors is an integer number (36216889795).

Almost surely, 2^72433779589 is an apocalyptic number.

It is an amenable number.

72433779589 is a deficient number, since it is larger than the sum of its proper divisors (1).

72433779589 is an equidigital number, since it uses as much as digits as its factorization.

72433779589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80015040, while the sum is 64.

The spelling of 72433779589 in words is "seventy-two billion, four hundred thirty-three million, seven hundred seventy-nine thousand, five hundred eighty-nine".