1818514543664 has 40 divisors (see below), whose sum is σ = 4336457761440. Its totient is φ = 719412346368.

The previous prime is 1818514543627. The next prime is 1818514543693. The reversal of 1818514543664 is 4663454158181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624488429 + ... + 624491340.

It is an arithmetic number, because the mean of its divisors is an integer number (108411444036).

Almost surely, 2^{1818514543664} is an apocalyptic number.

1818514543664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1818514543664 is an abundant number, since it is smaller than the sum of its proper divisors (2517943217776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818514543664 is a wasteful number, since it uses less digits than its factorization.

1818514543664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248979797 (or 1248979791 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 56.

The spelling of 1818514543664 in words is "one trillion, eight hundred eighteen billion, five hundred fourteen million, five hundred forty-three thousand, six hundred sixty-four".