18243558489600 has 360 divisors, whose sum is σ = 68127307131312. Its totient is φ = 4653428736000.

The previous prime is 18243558489547. The next prime is 18243558489601. The reversal of 18243558489600 is 698485534281.

18243558489600 is a `hidden beast` number, since 1 + 8 + 2 + 43 + 5 + 58 + 489 + 60 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18243558489601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 793101 + ... + 6092300.

Almost surely, 2^{18243558489600} is an apocalyptic number.

18243558489600 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 18243558489600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34063653565656).

18243558489600 is an abundant number, since it is smaller than the sum of its proper divisors (49883748641712).

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

18243558489600 is a wasteful number, since it uses less digits than its factorization.

18243558489600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885458 (or 6885434 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 63.

The spelling of 18243558489600 in words is "eighteen trillion, two hundred forty-three billion, five hundred fifty-eight million, four hundred eighty-nine thousand, six hundred".