1173242261549 has 2 divisors, whose sum is σ = 1173242261550. Its totient is φ = 1173242261548.

The previous prime is 1173242261539. The next prime is 1173242261573. The reversal of 1173242261549 is 9451622423711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810687745924 + 362554515625 = 900382^2 + 602125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1173242261549 - 2⁴ = 1173242261533 is a prime.

It is a super-2 number, since 2×1173242261549² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1173242261519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586621130774 + 586621130775.

It is an arithmetic number, because the mean of its divisors is an integer number (586621130775).

Almost surely, 2^{1173242261549} is an apocalyptic number.

It is an amenable number.

1173242261549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173242261549 is an equidigital number, since it uses as much as digits as its factorization.

1173242261549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The spelling of 1173242261549 in words is "one trillion, one hundred seventy-three billion, two hundred forty-two million, two hundred sixty-one thousand, five hundred forty-nine".