9991254192 has 40 divisors (see below), whose sum is σ = 25816127424. Its totient is φ = 3329722944.

The previous prime is 9991254191. The next prime is 9991254223. The reversal of 9991254192 is 2914521999.

It is not an unprimeable number, because it can be changed into a prime (9991254191) 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, 244203 + ... + 282165.

Almost surely, 2^9991254192 is an apocalyptic number.

It is an amenable number.

9991254192 is an abundant number, since it is smaller than the sum of its proper divisors (15824873232).

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

9991254192 is a wasteful number, since it uses less digits than its factorization.

9991254192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43457 (or 43451 counting only the distinct ones).

The product of its digits is 524880, while the sum is 51.

The square root of 9991254192 is about 99956.2613946720. The cubic root of 9991254192 is about 2153.8064311036.

The spelling of 9991254192 in words is "nine billion, nine hundred ninety-one million, two hundred fifty-four thousand, one hundred ninety-two".