1998454311360 has 504 divisors, whose sum is σ = 7583818679424. Its totient is φ = 482639339520.

The previous prime is 1998454311349. The next prime is 1998454311367. The reversal of 1998454311360 is 631134548991.

1998454311360 is a `hidden beast` number, since 1 + 9 + 9 + 84 + 543 + 1 + 13 + 6 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1998454311297 and 1998454311306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998454311367) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 25757425 + ... + 25834895.

Almost surely, 2^{1998454311360} is an apocalyptic number.

1998454311360 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 1998454311360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3791909339712).

1998454311360 is an abundant number, since it is smaller than the sum of its proper divisors (5585364368064).

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

1998454311360 is a wasteful number, since it uses less digits than its factorization.

1998454311360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77573 (or 77547 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 1998454311360 in words is "one trillion, nine hundred ninety-eight billion, four hundred fifty-four million, three hundred eleven thousand, three hundred sixty".