18557641466 has 64 divisors (see below), whose sum is σ = 34919162880. Its totient is φ = 7201509120.

The previous prime is 18557641457. The next prime is 18557641483. The reversal of 18557641466 is 66414675581.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2253236 + ... + 2261456.

It is an arithmetic number, because the mean of its divisors is an integer number (545611920).

Almost surely, 2^18557641466 is an apocalyptic number.

18557641466 is a deficient number, since it is larger than the sum of its proper divisors (16361521414).

18557641466 is a wasteful number, since it uses less digits than its factorization.

18557641466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8479.

The product of its digits is 4838400, while the sum is 53.

The spelling of 18557641466 in words is "eighteen billion, five hundred fifty-seven million, six hundred forty-one thousand, four hundred sixty-six".