9991254112 has 48 divisors (see below), whose sum is σ = 22490479872. Its totient is φ = 4280031360.

The previous prime is 9991254079. The next prime is 9991254113. The reversal of 9991254112 is 2114521999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991254113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558133 + ... + 575755.

It is an arithmetic number, because the mean of its divisors is an integer number (468551664).

Almost surely, 2^9991254112 is an apocalyptic number.

It is an amenable number.

9991254112 is an abundant number, since it is smaller than the sum of its proper divisors (12499225760).

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

9991254112 is a wasteful number, since it uses less digits than its factorization.

9991254112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20171 (or 20163 counting only the distinct ones).

The product of its digits is 58320, while the sum is 43.

The square root of 9991254112 is about 99956.2609944970. The cubic root of 9991254112 is about 2153.8064253551.

The spelling of 9991254112 in words is "nine billion, nine hundred ninety-one million, two hundred fifty-four thousand, one hundred twelve".