1218489237904 has 15 divisors (see below), whose sum is σ = 2360831453323. Its totient is φ = 609242411248.

The previous prime is 1218489237893. The next prime is 1218489237929. The reversal of 1218489237904 is 4097329848121.

The square root of 1218489237904 is 1103852.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 4277427 + ... + 4553389.

Almost surely, 2^{1218489237904} is an apocalyptic number.

1218489237904 is the 1103852-nd square number.

It is an amenable number.

1218489237904 is a deficient number, since it is larger than the sum of its proper divisors (1142342215419).

1218489237904 is an frugal number, since it uses more digits than its factorization.

1218489237904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551934 (or 275965 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 1218489237904 in words is "one trillion, two hundred eighteen billion, four hundred eighty-nine million, two hundred thirty-seven thousand, nine hundred four".