9861860736 has 576 divisors, whose sum is σ = 36188661600. Its totient is φ = 2554675200.

The previous prime is 9861860713. The next prime is 9861860747. The reversal of 9861860736 is 6370681689.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 65310261 + ... + 65310411.

Almost surely, 2^9861860736 is an apocalyptic number.

9861860736 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9861860736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18094330800).

9861860736 is an abundant number, since it is smaller than the sum of its proper divisors (26326800864).

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

9861860736 is a wasteful number, since it uses less digits than its factorization.

9861860736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 9861860736 is about 99306.9017541077. The cubic root of 9861860736 is about 2144.4682555619.

The spelling of 9861860736 in words is "nine billion, eight hundred sixty-one million, eight hundred sixty thousand, seven hundred thirty-six".