1811441450844 has 18 divisors (see below), whose sum is σ = 4578921445280. Its totient is φ = 603813816936.

The previous prime is 1811441450843. The next prime is 1811441450857. The reversal of 1811441450844 is 4480541441181.

1811441450844 is a `hidden beast` number, since 1 + 8 + 114 + 4 + 1 + 450 + 84 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1811441450844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811441450843) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 25158909004 + ... + 25158909075.

Almost surely, 2^{1811441450844} is an apocalyptic number.

It is an amenable number.

1811441450844 is an abundant number, since it is smaller than the sum of its proper divisors (2767479994436).

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

1811441450844 is a wasteful number, since it uses less digits than its factorization.

1811441450844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50317818089 (or 50317818084 counting only the distinct ones).

The product of its (nonzero) digits is 327680, while the sum is 45.

The spelling of 1811441450844 in words is "one trillion, eight hundred eleven billion, four hundred forty-one million, four hundred fifty thousand, eight hundred forty-four".