1218143553466 has 16 divisors (see below), whose sum is σ = 2089707459840. Its totient is φ = 521696180880.

The previous prime is 1218143553463. The next prime is 1218143553467. The reversal of 1218143553466 is 6643553418121.

It is a super-2 number, since 2×1218143553466² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1218143553463) 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, 30424450 + ... + 30464461.

It is an arithmetic number, because the mean of its divisors is an integer number (130606716240).

Almost surely, 2^{1218143553466} is an apocalyptic number.

1218143553466 is a deficient number, since it is larger than the sum of its proper divisors (871563906374).

1218143553466 is a wasteful number, since it uses less digits than its factorization.

1218143553466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60890349.

The product of its digits is 2073600, while the sum is 49.

The spelling of 1218143553466 in words is "one trillion, two hundred eighteen billion, one hundred forty-three million, five hundred fifty-three thousand, four hundred sixty-six".