18448416609 has 16 divisors (see below), whose sum is σ = 29765513088. Its totient is φ = 9921837312.

The previous prime is 18448416601. The next prime is 18448416631. The reversal of 18448416609 is 90661484481.

It is a happy number.

It is not a de Polignac number, because 18448416609 - 2³ = 18448416601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (18448416601) 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 15 ways as a sum of consecutive naturals, for example, 25837762 + ... + 25838475.

It is an arithmetic number, because the mean of its divisors is an integer number (1860344568).

Almost surely, 2^18448416609 is an apocalyptic number.

It is an amenable number.

18448416609 is a deficient number, since it is larger than the sum of its proper divisors (11317096479).

18448416609 is a wasteful number, since it uses less digits than its factorization.

18448416609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51676264.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 18448416609 in words is "eighteen billion, four hundred forty-eight million, four hundred sixteen thousand, six hundred nine".