998911065600 has 1080 divisors, whose sum is σ = 4224833767440. Its totient is φ = 220785868800.

The previous prime is 998911065589. The next prime is 998911065601. The reversal of 998911065600 is 6560119899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998911065601) 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 107 ways as a sum of consecutive naturals, for example, 774949756 + ... + 774951044.

It is an arithmetic number, because the mean of its divisors is an integer number (3911883118).

Almost surely, 2^998911065600 is an apocalyptic number.

998911065600 is a gapful number since it is divisible by the number (90) 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 998911065600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2112416883720).

998911065600 is an abundant number, since it is smaller than the sum of its proper divisors (3225922701840).

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

998911065600 is a wasteful number, since it uses less digits than its factorization.

998911065600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The spelling of 998911065600 in words is "nine hundred ninety-eight billion, nine hundred eleven million, sixty-five thousand, six hundred".