9776855220 has 96 divisors (see below), whose sum is σ = 29947760640. Its totient is φ = 2363487360.

The previous prime is 9776855147. The next prime is 9776855293. The reversal of 9776855220 is 225586779.

It is an interprime number because it is at equal distance from previous prime (9776855147) and next prime (9776855293).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216309 + ... + 257571.

It is an arithmetic number, because the mean of its divisors is an integer number (311955840).

Almost surely, 2^9776855220 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 9776855220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14973880320).

9776855220 is an abundant number, since it is smaller than the sum of its proper divisors (20170905420).

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

9776855220 is a wasteful number, since it uses less digits than its factorization.

9776855220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41645 (or 41643 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The square root of 9776855220 is about 98877.9814721154. The cubic root of 9776855220 is about 2138.2889647969.

The spelling of 9776855220 in words is "nine billion, seven hundred seventy-six million, eight hundred fifty-five thousand, two hundred twenty".