9775988916 has 24 divisors (see below), whose sum is σ = 22833187104. Its totient is φ = 3255442080.

The previous prime is 9775988909. The next prime is 9775988939. The reversal of 9775988916 is 6198895779.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389950 + ... + 414261.

It is an arithmetic number, because the mean of its divisors is an integer number (951382796).

Almost surely, 2^9775988916 is an apocalyptic number.

It is an amenable number.

9775988916 is an abundant number, since it is smaller than the sum of its proper divisors (13057198188).

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

9775988916 is a wasteful number, since it uses less digits than its factorization.

9775988916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805231 (or 805229 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 69.

The square root of 9775988916 is about 98873.6007031199. The cubic root of 9775988916 is about 2138.2258066901.

The spelling of 9775988916 in words is "nine billion, seven hundred seventy-five million, nine hundred eighty-eight thousand, nine hundred sixteen".