998015510688 has 96 divisors (see below), whose sum is σ = 2995990050816. Its totient is φ = 284962192128.

The previous prime is 998015510651. The next prime is 998015510689. The reversal of 998015510688 is 886015510899.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (998015510689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555645 + ... + 1518147.

It is an arithmetic number, because the mean of its divisors is an integer number (31208229696).

Almost surely, 2^998015510688 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 998015510688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497995025408).

998015510688 is an abundant number, since it is smaller than the sum of its proper divisors (1997974540128).

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

998015510688 is a wasteful number, since it uses less digits than its factorization.

998015510688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964066 (or 964058 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 60.

The spelling of 998015510688 in words is "nine hundred ninety-eight billion, fifteen million, five hundred ten thousand, six hundred eighty-eight".