9906889770240 has 144 divisors (see below), whose sum is σ = 31651824902208. Its totient is φ = 2640860725248.

The previous prime is 9906889770233. The next prime is 9906889770259. The reversal of 9906889770240 is 420779886099.

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, 9942447 + ... + 10893393.

Almost surely, 2^{9906889770240} 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 9906889770240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15825912451104).

9906889770240 is an abundant number, since it is smaller than the sum of its proper divisors (21744935131968).

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

9906889770240 is a wasteful number, since it uses less digits than its factorization.

9906889770240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953684 (or 953670 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 69.

The spelling of 9906889770240 in words is "nine trillion, nine hundred six billion, eight hundred eighty-nine million, seven hundred seventy thousand, two hundred forty".