998485073040 has 640 divisors, whose sum is σ = 4112376791040. Its totient is φ = 194558386176.

The previous prime is 998485073039. The next prime is 998485073041. The reversal of 998485073040 is 40370584899.

It is an interprime number because it is at equal distance from previous prime (998485073039) and next prime (998485073041).

It is not an unprimeable number, because it can be changed into a prime (998485073041) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14533009 + ... + 14601551.

It is an arithmetic number, because the mean of its divisors is an integer number (6425588736).

Almost surely, 2^998485073040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998485073040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2056188395520).

998485073040 is an abundant number, since it is smaller than the sum of its proper divisors (3113891718000).

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

998485073040 is a wasteful number, since it uses less digits than its factorization.

998485073040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68631 (or 68625 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 998485073040 in words is "nine hundred ninety-eight billion, four hundred eighty-five million, seventy-three thousand, forty".