998808756480 has 216 divisors, whose sum is σ = 3637657907520. Its totient is φ = 252330577920.

The previous prime is 998808756443. The next prime is 998808756487. The reversal of 998808756480 is 84657808899.

998808756480 is a `hidden beast` number, since 9 + 98 + 8 + 0 + 8 + 7 + 56 + 480 = 666.

It is a super-2 number, since 2×998808756480² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 998808756399 and 998808756408.

It is not an unprimeable number, because it can be changed into a prime (998808756487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2062756 + ... + 2500515.

Almost surely, 2^998808756480 is an apocalyptic number.

998808756480 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

998808756480 is an abundant number, since it is smaller than the sum of its proper divisors (2638849151040).

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

998808756480 is a wasteful number, since it uses less digits than its factorization.

998808756480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563317 (or 4563300 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 72.

The spelling of 998808756480 in words is "nine hundred ninety-eight billion, eight hundred eight million, seven hundred fifty-six thousand, four hundred eighty".