11843566169849 has 2 divisors, whose sum is σ = 11843566169850. Its totient is φ = 11843566169848.

The previous prime is 11843566169803. The next prime is 11843566169893. The reversal of 11843566169849 is 94896166534811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11516982494224 + 326583675625 = 3393668^2 + 571475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11843566169849 is a prime.

It is not a weakly prime, because it can be changed into another prime (11843566166849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5921783084924 + 5921783084925.

It is an arithmetic number, because the mean of its divisors is an integer number (5921783084925).

Almost surely, 2^{11843566169849} is an apocalyptic number.

It is an amenable number.

11843566169849 is a deficient number, since it is larger than the sum of its proper divisors (1).

11843566169849 is an equidigital number, since it uses as much as digits as its factorization.

11843566169849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268738560, while the sum is 71.

The spelling of 11843566169849 in words is "eleven trillion, eight hundred forty-three billion, five hundred sixty-six million, one hundred sixty-nine thousand, eight hundred forty-nine".