1218644944704 has 896 divisors, whose sum is σ = 4212384768000. Its totient is φ = 344443207680.

The previous prime is 1218644944691. The next prime is 1218644944711. The reversal of 1218644944704 is 4074494468121.

1218644944704 is a `hidden beast` number, since 1 + 2 + 1 + 86 + 4 + 4 + 94 + 470 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3452251792 + ... + 3452252144.

Almost surely, 2^{1218644944704} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218644944704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106192384000).

1218644944704 is an abundant number, since it is smaller than the sum of its proper divisors (2993739823296).

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

1218644944704 is a wasteful number, since it uses less digits than its factorization.

1218644944704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 1218644944704 in words is "one trillion, two hundred eighteen billion, six hundred forty-four million, nine hundred forty-four thousand, seven hundred four".