1105665106549 has 2 divisors, whose sum is σ = 1105665106550. Its totient is φ = 1105665106548.

The previous prime is 1105665106541. The next prime is 1105665106561. The reversal of 1105665106549 is 9456015665011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781924590225 + 323740516324 = 884265^2 + 568982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105665106549 - 2³ = 1105665106541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105665106541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552832553274 + 552832553275.

It is an arithmetic number, because the mean of its divisors is an integer number (552832553275).

Almost surely, 2^{1105665106549} is an apocalyptic number.

It is an amenable number.

1105665106549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105665106549 is an equidigital number, since it uses as much as digits as its factorization.

1105665106549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 1105665106549 in words is "one trillion, one hundred five billion, six hundred sixty-five million, one hundred six thousand, five hundred forty-nine".