9861612288 has 108 divisors (see below), whose sum is σ = 28849477944. Its totient is φ = 2988339200.

The previous prime is 9861612259. The next prime is 9861612377. The reversal of 9861612288 is 8822161689.

It is a self number, because there is not a number n which added to its sum of digits gives 9861612288.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39868 + ... + 145988.

Almost surely, 2^9861612288 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 9861612288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14424738972).

9861612288 is an abundant number, since it is smaller than the sum of its proper divisors (18987865656).

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

9861612288 is a wasteful number, since it uses less digits than its factorization.

9861612288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106162 (or 106137 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 9861612288 is about 99305.6508361936. The cubic root of 9861612288 is about 2144.4502470157.

The spelling of 9861612288 in words is "nine billion, eight hundred sixty-one million, six hundred twelve thousand, two hundred eighty-eight".