11388518089 has 9 divisors (see below), whose sum is σ = 12333448053. Its totient is φ = 10511197632.

The previous prime is 11388518077. The next prime is 11388518101. The reversal of 11388518089 is 98081588311.

The square root of 11388518089 is 106717.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (11388518077) and next prime (11388518101).

It can be written as a sum of positive squares in 4 ways, for example, as 7097220025 + 4291298064 = 84245^2 + 65508^2 .

It is not a de Polignac number, because 11388518089 - 2⁹ = 11388517577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11388518039) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1383217 + ... + 1391425.

It is an arithmetic number, because the mean of its divisors is an integer number (1370383117).

Almost surely, 2^11388518089 is an apocalyptic number.

11388518089 is the 106717-th square number.

11388518089 is the 53359-th centered octagonal number.

It is an amenable number.

11388518089 is a deficient number, since it is larger than the sum of its proper divisors (944929964).

11388518089 is an frugal number, since it uses more digits than its factorization.

11388518089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16444 (or 8222 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 52.

The spelling of 11388518089 in words is "eleven billion, three hundred eighty-eight million, five hundred eighteen thousand, eighty-nine".