1818442164474 has 96 divisors (see below), whose sum is σ = 4347192914064. Its totient is φ = 545789352960.

The previous prime is 1818442164457. The next prime is 1818442164529. The reversal of 1818442164474 is 4744612448181.

1818442164474 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 4 + 4 + 2 + 164 + 474 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 280576793025 + 1537865371449 = 529695^2 + 1240107^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1818442164474.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92217264 + ... + 92236980.

Almost surely, 2^{1818442164474} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818442164474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2173596457032).

1818442164474 is an abundant number, since it is smaller than the sum of its proper divisors (2528750749590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818442164474 is a wasteful number, since it uses less digits than its factorization.

1818442164474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29392 (or 29389 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 54.

The spelling of 1818442164474 in words is "one trillion, eight hundred eighteen billion, four hundred forty-two million, one hundred sixty-four thousand, four hundred seventy-four".