72225111869 has 2 divisors, whose sum is σ = 72225111870. Its totient is φ = 72225111868.

The previous prime is 72225111859. The next prime is 72225111883. The reversal of 72225111869 is 96811152227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67281615769 + 4943496100 = 259387^2 + 70310^2 .

It is an emirp because it is prime and its reverse (96811152227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72225111869 - 2⁴ = 72225111853 is a prime.

It is a super-2 number, since 2×72225111869² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72225111839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36112555934 + 36112555935.

It is an arithmetic number, because the mean of its divisors is an integer number (36112555935).

Almost surely, 2^72225111869 is an apocalyptic number.

It is an amenable number.

72225111869 is a deficient number, since it is larger than the sum of its proper divisors (1).

72225111869 is an equidigital number, since it uses as much as digits as its factorization.

72225111869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The spelling of 72225111869 in words is "seventy-two billion, two hundred twenty-five million, one hundred eleven thousand, eight hundred sixty-nine".