99998281094640 has 80 divisors (see below), whose sum is σ = 311325120800928. Its totient is φ = 26551761031168.

The previous prime is 99998281094623. The next prime is 99998281094669. The reversal of 99998281094640 is 4649018289999.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 894063189 + ... + 894175028.

Almost surely, 2^{99998281094640} is an apocalyptic number.

It is an amenable number.

99998281094640 is an abundant number, since it is smaller than the sum of its proper divisors (211326839706288).

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

99998281094640 is a wasteful number, since it uses less digits than its factorization.

99998281094640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788238466 (or 1788238460 counting only the distinct ones).

The product of its (nonzero) digits is 725594112, while the sum is 78.

The spelling of 99998281094640 in words is "ninety-nine trillion, nine hundred ninety-eight billion, two hundred eighty-one million, ninety-four thousand, six hundred forty".