9989087961840 has 960 divisors, whose sum is σ = 36762451623936. Its totient is φ = 2233213452288.

The previous prime is 9989087961833. The next prime is 9989087961851. The reversal of 9989087961840 is 481697809899.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3240052939 + ... + 3240056021.

Almost surely, 2^{9989087961840} 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 9989087961840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18381225811968).

9989087961840 is an abundant number, since it is smaller than the sum of its proper divisors (26773363662096).

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

9989087961840 is a wasteful number, since it uses less digits than its factorization.

9989087961840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306 (or 3287 counting only the distinct ones).

The product of its (nonzero) digits is 564350976, while the sum is 78.

The spelling of 9989087961840 in words is "nine trillion, nine hundred eighty-nine billion, eighty-seven million, nine hundred sixty-one thousand, eight hundred forty".