1818256050638 has 8 divisors (see below), whose sum is σ = 2727418541232. Its totient is φ = 909116536896.

The previous prime is 1818256050629. The next prime is 1818256050643. The reversal of 1818256050638 is 8360506528181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1818256050638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5544995 + ... + 5863742.

It is an arithmetic number, because the mean of its divisors is an integer number (340927317654).

Almost surely, 2^{1818256050638} is an apocalyptic number.

1818256050638 is a deficient number, since it is larger than the sum of its proper divisors (909162490594).

1818256050638 is a wasteful number, since it uses less digits than its factorization.

1818256050638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11488426.

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 1818256050638 in words is "one trillion, eight hundred eighteen billion, two hundred fifty-six million, fifty thousand, six hundred thirty-eight".