99881389517660 has 96 divisors (see below), whose sum is σ = 223872071367168. Its totient is φ = 37301334220800.

The previous prime is 99881389517633. The next prime is 99881389517717. The reversal of 99881389517660 is 6671598318899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30860360 + ... + 33942960.

It is an arithmetic number, because the mean of its divisors is an integer number (2332000743408).

Almost surely, 2^{99881389517660} 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 99881389517660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111936035683584).

99881389517660 is an abundant number, since it is smaller than the sum of its proper divisors (123990681849508).

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

99881389517660 is a wasteful number, since it uses less digits than its factorization.

99881389517660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083391 (or 3083389 counting only the distinct ones).

The product of its (nonzero) digits is 1410877440, while the sum is 80.

The spelling of 99881389517660 in words is "ninety-nine trillion, eight hundred eighty-one billion, three hundred eighty-nine million, five hundred seventeen thousand, six hundred sixty".