1158552521281 has 2 divisors, whose sum is σ = 1158552521282. Its totient is φ = 1158552521280.

The previous prime is 1158552521233. The next prime is 1158552521297. The reversal of 1158552521281 is 1821252558511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814082130225 + 344470391056 = 902265^2 + 586916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158552521281 - 2¹⁹ = 1158551996993 is a prime.

It is a super-2 number, since 2×1158552521281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1158552521201) 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, 579276260640 + 579276260641.

It is an arithmetic number, because the mean of its divisors is an integer number (579276260641).

Almost surely, 2^{1158552521281} is an apocalyptic number.

It is an amenable number.

1158552521281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158552521281 is an equidigital number, since it uses as much as digits as its factorization.

1158552521281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320000, while the sum is 46.

The spelling of 1158552521281 in words is "one trillion, one hundred fifty-eight billion, five hundred fifty-two million, five hundred twenty-one thousand, two hundred eighty-one".