11485507889 has 4 divisors (see below), whose sum is σ = 11485805424. Its totient is φ = 11485210356.

The previous prime is 11485507849. The next prime is 11485507903. The reversal of 11485507889 is 98870558411.

11485507889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98870558411 = 59581 ⋅1659431.

It is a cyclic number.

It is not a de Polignac number, because 11485507889 - 2¹² = 11485503793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11485507849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80387 + ... + 171560.

It is an arithmetic number, because the mean of its divisors is an integer number (2871451356).

Almost surely, 2^11485507889 is an apocalyptic number.

It is an amenable number.

11485507889 is a deficient number, since it is larger than the sum of its proper divisors (297535).

11485507889 is an equidigital number, since it uses as much as digits as its factorization.

11485507889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297534.

The product of its (nonzero) digits is 3225600, while the sum is 56.

The spelling of 11485507889 in words is "eleven billion, four hundred eighty-five million, five hundred seven thousand, eight hundred eighty-nine".