18526664705 has 16 divisors (see below), whose sum is σ = 22436838864. Its totient is φ = 14684866560.

The previous prime is 18526664677. The next prime is 18526664707. The reversal of 18526664705 is 50746662581.

It can be written as a sum of positive squares in 8 ways, for example, as 39639616 + 18487025089 = 6296^2 + 135967^2 .

It is not a de Polignac number, because 18526664705 - 2²² = 18522470401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18526664707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2494157 + ... + 2501573.

It is an arithmetic number, because the mean of its divisors is an integer number (1402302429).

Almost surely, 2^18526664705 is an apocalyptic number.

It is an amenable number.

18526664705 is a deficient number, since it is larger than the sum of its proper divisors (3910174159).

18526664705 is a wasteful number, since it uses less digits than its factorization.

18526664705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11956.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 18526664705 in words is "eighteen billion, five hundred twenty-six million, six hundred sixty-four thousand, seven hundred five".