9386942819521 has 2 divisors, whose sum is σ = 9386942819522. Its totient is φ = 9386942819520.

The previous prime is 9386942819519. The next prime is 9386942819531. The reversal of 9386942819521 is 1259182496839.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6981220840000 + 2405721979521 = 2642200^2 + 1551039^2 .

It is a cyclic number.

It is not a de Polignac number, because 9386942819521 - 2¹ = 9386942819519 is a prime.

It is a super-2 number, since 2×9386942819521² (a number of 27 digits) contains 22 as substring.

Together with 9386942819519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9386942819531) 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, 4693471409760 + 4693471409761.

It is an arithmetic number, because the mean of its divisors is an integer number (4693471409761).

Almost surely, 2^{9386942819521} is an apocalyptic number.

It is an amenable number.

9386942819521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9386942819521 is an equidigital number, since it uses as much as digits as its factorization.

9386942819521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67184640, while the sum is 67.

The spelling of 9386942819521 in words is "nine trillion, three hundred eighty-six billion, nine hundred forty-two million, eight hundred nineteen thousand, five hundred twenty-one".