38443418989 has 2 divisors, whose sum is σ = 38443418990. Its totient is φ = 38443418988.

The previous prime is 38443418983. The next prime is 38443419103. The reversal of 38443418989 is 98981434483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27274522500 + 11168896489 = 165150^2 + 105683^2 .

It is an emirp because it is prime and its reverse (98981434483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38443418989 - 2⁹ = 38443418477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38443418983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19221709494 + 19221709495.

It is an arithmetic number, because the mean of its divisors is an integer number (19221709495).

Almost surely, 2^38443418989 is an apocalyptic number.

It is an amenable number.

38443418989 is a deficient number, since it is larger than the sum of its proper divisors (1).

38443418989 is an equidigital number, since it uses as much as digits as its factorization.

38443418989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23887872, while the sum is 61.

The spelling of 38443418989 in words is "thirty-eight billion, four hundred forty-three million, four hundred eighteen thousand, nine hundred eighty-nine".