998365592640 has 896 divisors, whose sum is σ = 3724614254592. Its totient is φ = 224584335360.

The previous prime is 998365592629. The next prime is 998365592677. The reversal of 998365592640 is 46295563899.

998365592640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 580106980 + ... + 580108700.

It is an arithmetic number, because the mean of its divisors is an integer number (4156935552).

Almost surely, 2^998365592640 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 998365592640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862307127296).

998365592640 is an abundant number, since it is smaller than the sum of its proper divisors (2726248661952).

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

998365592640 is a wasteful number, since it uses less digits than its factorization.

998365592640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 125971200, while the sum is 66.

The spelling of 998365592640 in words is "nine hundred ninety-eight billion, three hundred sixty-five million, five hundred ninety-two thousand, six hundred forty".