18008111465 has 4 divisors (see below), whose sum is σ = 21609733764. Its totient is φ = 14406489168.

The previous prime is 18008111447. The next prime is 18008111477. The reversal of 18008111465 is 56411180081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56411180081 = 41 ⋅1375882441.

It can be written as a sum of positive squares in 2 ways, for example, as 3630183001 + 14377928464 = 60251^2 + 119908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18008111465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1800811142 + ... + 1800811151.

It is an arithmetic number, because the mean of its divisors is an integer number (5402433441).

Almost surely, 2^18008111465 is an apocalyptic number.

It is an amenable number.

18008111465 is a deficient number, since it is larger than the sum of its proper divisors (3601622299).

18008111465 is an equidigital number, since it uses as much as digits as its factorization.

18008111465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601622298.

The product of its (nonzero) digits is 7680, while the sum is 35.

The spelling of 18008111465 in words is "eighteen billion, eight million, one hundred eleven thousand, four hundred sixty-five".