1816974144 has 84 divisors (see below), whose sum is σ = 5514412644. Its totient is φ = 570028032.

The previous prime is 1816974119. The next prime is 1816974151. The reversal of 1816974144 is 4414796181.

It can be written as a sum of positive squares in 2 ways, for example, as 1360724544 + 456249600 = 36888^2 + 21360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1816974144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82987 + ... + 102570.

Almost surely, 2^1816974144 is an apocalyptic number.

It is an amenable number.

1816974144 is an abundant number, since it is smaller than the sum of its proper divisors (3697438500).

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

1816974144 is a wasteful number, since it uses less digits than its factorization.

1816974144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185592 (or 185579 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1816974144 is about 42625.9796837562. The cubic root of 1816974144 is about 1220.2521524854.

The spelling of 1816974144 in words is "one billion, eight hundred sixteen million, nine hundred seventy-four thousand, one hundred forty-four".