11557381489 has 2 divisors, whose sum is σ = 11557381490. Its totient is φ = 11557381488.

The previous prime is 11557381463. The next prime is 11557381499. The reversal of 11557381489 is 98418375511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11488624225 + 68757264 = 107185^2 + 8292^2 .

It is a cyclic number.

It is not a de Polignac number, because 11557381489 - 2¹⁷ = 11557250417 is a prime.

It is not a weakly prime, because it can be changed into another prime (11557381499) 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, 5778690744 + 5778690745.

It is an arithmetic number, because the mean of its divisors is an integer number (5778690745).

Almost surely, 2^11557381489 is an apocalyptic number.

It is an amenable number.

11557381489 is a deficient number, since it is larger than the sum of its proper divisors (1).

11557381489 is an equidigital number, since it uses as much as digits as its factorization.

11557381489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 52.

The spelling of 11557381489 in words is "eleven billion, five hundred fifty-seven million, three hundred eighty-one thousand, four hundred eighty-nine".