1998455086600 has 192 divisors, whose sum is σ = 5335322803200. Its totient is φ = 681947424000.

The previous prime is 1998455086517. The next prime is 1998455086601. The reversal of 1998455086600 is 66805548991.

It is not an unprimeable number, because it can be changed into a prime (1998455086601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 321757495 + ... + 321763705.

It is an arithmetic number, because the mean of its divisors is an integer number (27788139600).

Almost surely, 2^{1998455086600} is an apocalyptic number.

1998455086600 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 1998455086600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2667661401600).

1998455086600 is an abundant number, since it is smaller than the sum of its proper divisors (3336867716600).

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

1998455086600 is a wasteful number, since it uses less digits than its factorization.

1998455086600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7284 (or 7275 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 61.

The spelling of 1998455086600 in words is "one trillion, nine hundred ninety-eight billion, four hundred fifty-five million, eighty-six thousand, six hundred".