9919778882 has 16 divisors (see below), whose sum is σ = 16720966080. Its totient is φ = 4379300112.

The previous prime is 9919778881. The next prime is 9919778887. The reversal of 9919778882 is 2888779199.

It is not an unprimeable number, because it can be changed into a prime (9919778881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8293532 + ... + 8294727.

It is an arithmetic number, because the mean of its divisors is an integer number (1045060380).

Almost surely, 2^9919778882 is an apocalyptic number.

9919778882 is a deficient number, since it is larger than the sum of its proper divisors (6801187198).

9919778882 is a wasteful number, since it uses less digits than its factorization.

9919778882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16588297.

The product of its digits is 36578304, while the sum is 68.

The square root of 9919778882 is about 99598.0867386518. The cubic root of 9919778882 is about 2148.6581771238.

The spelling of 9919778882 in words is "nine billion, nine hundred nineteen million, seven hundred seventy-eight thousand, eight hundred eighty-two".