1218498422400 has 864 divisors, whose sum is σ = 5160483413280. Its totient is φ = 278480332800.

The previous prime is 1218498422369. The next prime is 1218498422411. The reversal of 1218498422400 is 42248948121.

1218498422400 is a `hidden beast` number, since 1 + 2 + 184 + 9 + 8 + 422 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 146962255 + ... + 146970545.

Almost surely, 2^{1218498422400} is an apocalyptic number.

1218498422400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218498422400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2580241706640).

1218498422400 is an abundant number, since it is smaller than the sum of its proper divisors (3941984990880).

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

1218498422400 is an frugal number, since it uses more digits than its factorization.

1218498422400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8346 (or 8308 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 1218498422400 in words is "one trillion, two hundred eighteen billion, four hundred ninety-eight million, four hundred twenty-two thousand, four hundred".