9861388616 has 16 divisors (see below), whose sum is σ = 18724156800. Its totient is φ = 4868280144.

The previous prime is 9861388601. The next prime is 9861388619. The reversal of 9861388616 is 6168831689.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9861388619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7801100 + ... + 7802363.

It is an arithmetic number, because the mean of its divisors is an integer number (1170259800).

Almost surely, 2^9861388616 is an apocalyptic number.

It is an amenable number.

9861388616 is a deficient number, since it is larger than the sum of its proper divisors (8862768184).

9861388616 is a wasteful number, since it uses less digits than its factorization.

9861388616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15603548 (or 15603544 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 56.

The square root of 9861388616 is about 99304.5246501890. The cubic root of 9861388616 is about 2144.4340340785.

The spelling of 9861388616 in words is "nine billion, eight hundred sixty-one million, three hundred eighty-eight thousand, six hundred sixteen".