9778889500 has 48 divisors (see below), whose sum is σ = 21878045280. Its totient is φ = 3816144000.

The previous prime is 9778889489. The next prime is 9778889503. The reversal of 9778889500 is 59888779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9778889503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218010 + ... + 259009.

It is an arithmetic number, because the mean of its divisors is an integer number (455792610).

Almost surely, 2^9778889500 is an apocalyptic number.

It is an amenable number.

9778889500 is an abundant number, since it is smaller than the sum of its proper divisors (12099155780).

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

9778889500 is a wasteful number, since it uses less digits than its factorization.

9778889500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477079 (or 477067 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 61.

The square root of 9778889500 is about 98888.2677571005. The cubic root of 9778889500 is about 2138.4372598167.

The spelling of 9778889500 in words is "nine billion, seven hundred seventy-eight million, eight hundred eighty-nine thousand, five hundred".