9860215680 has 768 divisors, whose sum is σ = 41829465600. Its totient is φ = 2090188800.

The previous prime is 9860215643. The next prime is 9860215691. The reversal of 9860215680 is 865120689.

9860215680 is a `hidden beast` number, since 9 + 8 + 60 + 21 + 568 + 0 = 666.

9860215680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9860215680² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 46730775 + ... + 46730985.

It is an arithmetic number, because the mean of its divisors is an integer number (54465450).

Almost surely, 2^9860215680 is an apocalyptic number.

9860215680 is a gapful number since it is divisible by the number (90) 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 9860215680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20914732800).

9860215680 is an abundant number, since it is smaller than the sum of its proper divisors (31969249920).

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

9860215680 is a wasteful number, since it uses less digits than its factorization.

9860215680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 9860215680 is about 99298.6187215109. The cubic root of 9860215680 is about 2144.3490094197.

The spelling of 9860215680 in words is "nine billion, eight hundred sixty million, two hundred fifteen thousand, six hundred eighty".