998962940640 has 384 divisors, whose sum is σ = 3853707217920. Its totient is φ = 212312752128.

The previous prime is 998962940639. The next prime is 998962940641. The reversal of 998962940640 is 46049269899.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (998962940639) and next prime (998962940641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998962940641) 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 63 ways as a sum of consecutive naturals, for example, 4635606 + ... + 4846314.

It is an arithmetic number, because the mean of its divisors is an integer number (10035695880).

Almost surely, 2^998962940640 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 998962940640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926853608960).

998962940640 is an abundant number, since it is smaller than the sum of its proper divisors (2854744277280).

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

998962940640 is a wasteful number, since it uses less digits than its factorization.

998962940640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210834 (or 210826 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 66.

The spelling of 998962940640 in words is "nine hundred ninety-eight billion, nine hundred sixty-two million, nine hundred forty thousand, six hundred forty".