18447479608166 has 16 divisors (see below), whose sum is σ = 31654000783104. Its totient is φ = 7898625182664.

The previous prime is 18447479608081. The next prime is 18447479608169. The reversal of 18447479608166 is 66180697474481.

It is a super-3 number, since 3×18447479608166³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18447479608166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18447479608169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619776800 + ... + 619806563.

It is an arithmetic number, because the mean of its divisors is an integer number (1978375048944).

Almost surely, 2^{18447479608166} is an apocalyptic number.

18447479608166 is a deficient number, since it is larger than the sum of its proper divisors (13206521174938).

18447479608166 is a wasteful number, since it uses less digits than its factorization.

18447479608166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239584435.

The product of its (nonzero) digits is 390168576, while the sum is 71.

The spelling of 18447479608166 in words is "eighteen trillion, four hundred forty-seven billion, four hundred seventy-nine million, six hundred eight thousand, one hundred sixty-six".