11520055489 has 2 divisors, whose sum is σ = 11520055490. Its totient is φ = 11520055488.

The previous prime is 11520055427. The next prime is 11520055493. The reversal of 11520055489 is 98455002511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10939486464 + 580569025 = 104592^2 + 24095^2 .

It is an emirp because it is prime and its reverse (98455002511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11520055489 - 2¹⁹ = 11519531201 is a prime.

It is not a weakly prime, because it can be changed into another prime (11520050489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760027744 + 5760027745.

It is an arithmetic number, because the mean of its divisors is an integer number (5760027745).

Almost surely, 2^11520055489 is an apocalyptic number.

It is an amenable number.

11520055489 is a deficient number, since it is larger than the sum of its proper divisors (1).

11520055489 is an equidigital number, since it uses as much as digits as its factorization.

11520055489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 11520055489 in words is "eleven billion, five hundred twenty million, fifty-five thousand, four hundred eighty-nine".