1218576655564 has 6 divisors (see below), whose sum is σ = 2132509147244. Its totient is φ = 609288327780.

The previous prime is 1218576655561. The next prime is 1218576655573. The reversal of 1218576655564 is 4655566758121.

It is not an unprimeable number, because it can be changed into a prime (1218576655561) by changing a digit.

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 as a sum of consecutive naturals, namely, 152322081942 + ... + 152322081949.

Almost surely, 2^{1218576655564} is an apocalyptic number.

It is an amenable number.

1218576655564 is a deficient number, since it is larger than the sum of its proper divisors (913932491680).

1218576655564 is a wasteful number, since it uses less digits than its factorization.

1218576655564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304644163895 (or 304644163893 counting only the distinct ones).

The product of its digits is 60480000, while the sum is 61.

The spelling of 1218576655564 in words is "one trillion, two hundred eighteen billion, five hundred seventy-six million, six hundred fifty-five thousand, five hundred sixty-four".