18849228117169 has 2 divisors, whose sum is σ = 18849228117170. Its totient is φ = 18849228117168.

The previous prime is 18849228117151. The next prime is 18849228117229. The reversal of 18849228117169 is 96171182294881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14809128117169 + 4040100000000 = 3848263^2 + 2010000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18849228117169 is a prime.

It is a super-2 number, since 2×18849228117169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18849228117119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9424614058584 + 9424614058585.

It is an arithmetic number, because the mean of its divisors is an integer number (9424614058585).

Almost surely, 2^{18849228117169} is an apocalyptic number.

It is an amenable number.

18849228117169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18849228117169 is an equidigital number, since it uses as much as digits as its factorization.

18849228117169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 67.

The spelling of 18849228117169 in words is "eighteen trillion, eight hundred forty-nine billion, two hundred twenty-eight million, one hundred seventeen thousand, one hundred sixty-nine".