987065890722 has 54 divisors (see below), whose sum is σ = 2198353458483. Its totient is φ = 320078896704.

The previous prime is 987065890703. The next prime is 987065890751. The reversal of 987065890722 is 227098560789.

It can be written as a sum of positive squares in 5 ways, for example, as 984280267881 + 2785622841 = 992109^2 + 52779^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=702519.

It is a self number, because there is not a number n which added to its sum of digits gives 987065890722.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 155956054 + ... + 155962382.

Almost surely, 2^987065890722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987065890722

987065890722 is an abundant number, since it is smaller than the sum of its proper divisors (1211287567761).

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

987065890722 is an frugal number, since it uses more digits than its factorization.

987065890722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12740 (or 6371 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The spelling of 987065890722 in words is "nine hundred eighty-seven billion, sixty-five million, eight hundred ninety thousand, seven hundred twenty-two".