9999761112 has 192 divisors, whose sum is σ = 30344371200. Its totient is φ = 2948762880.

The previous prime is 9999761111. The next prime is 9999761201. The reversal of 9999761112 is 2111679999.

9999761112 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 7 + 611 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999761111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16312518 + ... + 16313130.

It is an arithmetic number, because the mean of its divisors is an integer number (158043600).

Almost surely, 2^9999761112 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 9999761112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15172185600).

9999761112 is an abundant number, since it is smaller than the sum of its proper divisors (20344610088).

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

9999761112 is a wasteful number, since it uses less digits than its factorization.

9999761112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158 (or 1151 counting only the distinct ones).

The product of its digits is 551124, while the sum is 54.

The square root of 9999761112 is about 99998.8055528665. The cubic root of 9999761112 is about 2154.4175342755.

The spelling of 9999761112 in words is "nine billion, nine hundred ninety-nine million, seven hundred sixty-one thousand, one hundred twelve".