1816618383 has 36 divisors (see below), whose sum is σ = 2736372288. Its totient is φ = 1160127360.

The previous prime is 1816618357. The next prime is 1816618393. The reversal of 1816618383 is 3838166181.

1816618383 is a `hidden beast` number, since 18 + 16 + 618 + 3 + 8 + 3 = 666.

It is not a de Polignac number, because 1816618383 - 2⁸ = 1816618127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816618303) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 5390391 + ... + 5390727.

Almost surely, 2^1816618383 is an apocalyptic number.

1816618383 is a deficient number, since it is larger than the sum of its proper divisors (919753905).

1816618383 is a wasteful number, since it uses less digits than its factorization.

1816618383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 510 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1816618383 is about 42621.8064258192. The cubic root of 1816618383 is about 1220.1725060645.

The spelling of 1816618383 in words is "one billion, eight hundred sixteen million, six hundred eighteen thousand, three hundred eighty-three".