9778559808 has 112 divisors (see below), whose sum is σ = 26473708800. Its totient is φ = 3184041984.

The previous prime is 9778559797. The next prime is 9778559827. The reversal of 9778559808 is 8089558779.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9321268 + ... + 9322316.

It is an arithmetic number, because the mean of its divisors is an integer number (236372400).

Almost surely, 2^9778559808 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 9778559808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13236854400).

9778559808 is an abundant number, since it is smaller than the sum of its proper divisors (16695148992).

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

9778559808 is a wasteful number, since it uses less digits than its factorization.

9778559808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 66.

The square root of 9778559808 is about 98886.6007505567. The cubic root of 9778559808 is about 2138.4132273134.

The spelling of 9778559808 in words is "nine billion, seven hundred seventy-eight million, five hundred fifty-nine thousand, eight hundred eight".