9778221180 has 480 divisors, whose sum is σ = 39751810560. Its totient is φ = 1953953280.

The previous prime is 9778221169. The next prime is 9778221191. The reversal of 9778221180 is 811228779.

9778221180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9778221169) and next prime (9778221191).

It is a super-2 number, since 2×9778221180² (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 159 ways as a sum of consecutive naturals, for example, 2799235 + ... + 2802725.

It is an arithmetic number, because the mean of its divisors is an integer number (82816272).

Almost surely, 2^9778221180 is an apocalyptic number.

9778221180 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 9778221180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19875905280).

9778221180 is an abundant number, since it is smaller than the sum of its proper divisors (29973589380).

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

9778221180 is a wasteful number, since it uses less digits than its factorization.

9778221180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551 (or 3540 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 9778221180 is about 98884.8885320705. Note that the first 3 decimals coincide. The cubic root of 9778221180 is about 2138.3885428689.

The spelling of 9778221180 in words is "nine billion, seven hundred seventy-eight million, two hundred twenty-one thousand, one hundred eighty".