998831554560 has 900 divisors, whose sum is σ = 4177124006328. Its totient is φ = 228304355328.

The previous prime is 998831554549. The next prime is 998831554583. The reversal of 998831554560 is 65455138899.

998831554560 is a `hidden beast` number, since 9 + 9 + 8 + 8 + 3 + 15 + 54 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 142690222077 + ... + 142690222083.

Almost surely, 2^998831554560 is an apocalyptic number.

998831554560 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 998831554560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2088562003164).

998831554560 is an abundant number, since it is smaller than the sum of its proper divisors (3178292451768).

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

998831554560 is an frugal number, since it uses more digits than its factorization.

998831554560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 63.

The spelling of 998831554560 in words is "nine hundred ninety-eight billion, eight hundred thirty-one million, five hundred fifty-four thousand, five hundred sixty".