99543633040 has 80 divisors (see below), whose sum is σ = 234554237568. Its totient is φ = 39282833408.

The previous prime is 99543633023. The next prime is 99543633151. The reversal of 99543633040 is 4033634599.

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

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, 4923432 + ... + 4943608.

Almost surely, 2^99543633040 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 99543633040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117277118784).

99543633040 is an abundant number, since it is smaller than the sum of its proper divisors (135010604528).

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

99543633040 is a wasteful number, since it uses less digits than its factorization.

99543633040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21016 (or 21010 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 46.

The spelling of 99543633040 in words is "ninety-nine billion, five hundred forty-three million, six hundred thirty-three thousand, forty".