1218053558 has 16 divisors (see below), whose sum is σ = 1924655040. Its totient is φ = 576549000.

The previous prime is 1218053533. The next prime is 1218053567. The reversal of 1218053558 is 8553508121.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 44093 + ... + 66183.

It is an arithmetic number, because the mean of its divisors is an integer number (120290940).

Almost surely, 2^1218053558 is an apocalyptic number.

1218053558 is a deficient number, since it is larger than the sum of its proper divisors (706601482).

1218053558 is a wasteful number, since it uses less digits than its factorization.

1218053558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23563.

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 1218053558 is about 34900.6240345355. The cubic root of 1218053558 is about 1067.9611677961.

The spelling of 1218053558 in words is "one billion, two hundred eighteen million, fifty-three thousand, five hundred fifty-eight".