8185738369 has 2 divisors, whose sum is σ = 8185738370. Its totient is φ = 8185738368.

The previous prime is 8185738367. The next prime is 8185738399. The reversal of 8185738369 is 9638375818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8103600400 + 82137969 = 90020^2 + 9063^2 .

It is a cyclic number.

It is not a de Polignac number, because 8185738369 - 2¹ = 8185738367 is a prime.

It is a super-2 number, since 2×8185738369² (a number of 21 digits) contains 22 as substring.

Together with 8185738367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8185738361) 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, 4092869184 + 4092869185.

It is an arithmetic number, because the mean of its divisors is an integer number (4092869185).

Almost surely, 2^8185738369 is an apocalyptic number.

It is an amenable number.

8185738369 is a deficient number, since it is larger than the sum of its proper divisors (1).

8185738369 is an equidigital number, since it uses as much as digits as its factorization.

8185738369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 58.

The square root of 8185738369 is about 90475.0704282677. The cubic root of 8185738369 is about 2015.3599316802.

The spelling of 8185738369 in words is "eight billion, one hundred eighty-five million, seven hundred thirty-eight thousand, three hundred sixty-nine".