18450064459 has 4 divisors (see below), whose sum is σ = 18531342504. Its totient is φ = 18368786416.

The previous prime is 18450064447. The next prime is 18450064469. The reversal of 18450064459 is 95446005481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18450064459 - 2¹⁷ = 18449933387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18450064429) 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, 40638682 + ... + 40639135.

It is an arithmetic number, because the mean of its divisors is an integer number (4632835626).

Almost surely, 2^18450064459 is an apocalyptic number.

18450064459 is a deficient number, since it is larger than the sum of its proper divisors (81278045).

18450064459 is an equidigital number, since it uses as much as digits as its factorization.

18450064459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81278044.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 18450064459 in words is "eighteen billion, four hundred fifty million, sixty-four thousand, four hundred fifty-nine".