1165741222549 has 2 divisors, whose sum is σ = 1165741222550. Its totient is φ = 1165741222548.

The previous prime is 1165741222537. The next prime is 1165741222601. The reversal of 1165741222549 is 9452221475611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1162554055524 + 3187167025 = 1078218^2 + 56455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165741222549 - 2³⁷ = 1028302269077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165741222049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582870611274 + 582870611275.

It is an arithmetic number, because the mean of its divisors is an integer number (582870611275).

Almost surely, 2^{1165741222549} is an apocalyptic number.

It is an amenable number.

1165741222549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165741222549 is an equidigital number, since it uses as much as digits as its factorization.

1165741222549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 49.

The spelling of 1165741222549 in words is "one trillion, one hundred sixty-five billion, seven hundred forty-one million, two hundred twenty-two thousand, five hundred forty-nine".