11445181809 has 8 divisors (see below), whose sum is σ = 15260791680. Its totient is φ = 7629846576.

The previous prime is 11445181793. The next prime is 11445181837. The reversal of 11445181809 is 90818154411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11445181809 - 2⁴ = 11445181793 is a prime.

It is a super-3 number, since 3×11445181809³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11445181859) 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 in 7 ways as a sum of consecutive naturals, for example, 66712 + ... + 165350.

It is an arithmetic number, because the mean of its divisors is an integer number (1907598960).

Almost surely, 2^11445181809 is an apocalyptic number.

It is an amenable number.

11445181809 is a deficient number, since it is larger than the sum of its proper divisors (3815609871).

11445181809 is an equidigital number, since it uses as much as digits as its factorization.

11445181809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137319.

The product of its (nonzero) digits is 46080, while the sum is 42.

The spelling of 11445181809 in words is "eleven billion, four hundred forty-five million, one hundred eighty-one thousand, eight hundred nine".