18075444745 has 4 divisors (see below), whose sum is σ = 21690533700. Its totient is φ = 14460355792.

The previous prime is 18075444689. The next prime is 18075444817. The reversal of 18075444745 is 54744457081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4981677561 + 13093767184 = 70581^2 + 114428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18075444745 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1807544470 + ... + 1807544479.

It is an arithmetic number, because the mean of its divisors is an integer number (5422633425).

Almost surely, 2^18075444745 is an apocalyptic number.

It is an amenable number.

18075444745 is a deficient number, since it is larger than the sum of its proper divisors (3615088955).

18075444745 is an equidigital number, since it uses as much as digits as its factorization.

18075444745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615088954.

The product of its (nonzero) digits is 2508800, while the sum is 49.

The spelling of 18075444745 in words is "eighteen billion, seventy-five million, four hundred forty-four thousand, seven hundred forty-five".