9861622344 has 384 divisors, whose sum is σ = 34267484160. Its totient is φ = 2592580608.

The previous prime is 9861622339. The next prime is 9861622357. The reversal of 9861622344 is 4432261689.

9861622344 is a `hidden beast` number, since 9 + 8 + 616 + 2 + 23 + 4 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 9861622344.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10872339 + ... + 10873245.

It is an arithmetic number, because the mean of its divisors is an integer number (89238240).

Almost surely, 2^9861622344 is an apocalyptic number.

9861622344 is a gapful number since it is divisible by the number (94) 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 9861622344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17133742080).

9861622344 is an abundant number, since it is smaller than the sum of its proper divisors (24405861816).

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

9861622344 is a wasteful number, since it uses less digits than its factorization.

9861622344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 983 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 9861622344 is about 99305.7014677405. The cubic root of 9861622344 is about 2144.4509759224.

The spelling of 9861622344 in words is "nine billion, eight hundred sixty-one million, six hundred twenty-two thousand, three hundred forty-four".