1218473738564 has 24 divisors (see below), whose sum is σ = 2225090564928. Its totient is φ = 582734804960.

The previous prime is 1218473738563. The next prime is 1218473738627. The reversal of 1218473738564 is 4658373748121.

It is not an unprimeable number, because it can be changed into a prime (1218473738561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4651079 + ... + 4906065.

It is an arithmetic number, because the mean of its divisors is an integer number (92712106872).

Almost surely, 2^{1218473738564} is an apocalyptic number.

It is an amenable number.

1218473738564 is a deficient number, since it is larger than the sum of its proper divisors (1006616826364).

1218473738564 is a wasteful number, since it uses less digits than its factorization.

1218473738564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306955 (or 306953 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 59.

The spelling of 1218473738564 in words is "one trillion, two hundred eighteen billion, four hundred seventy-three million, seven hundred thirty-eight thousand, five hundred sixty-four".