9991115011 has 8 divisors (see below), whose sum is σ = 10085019120. Its totient is φ = 9897307392.

The previous prime is 9991115009. The next prime is 9991115081. The reversal of 9991115011 is 1105111999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9991115011 - 2¹ = 9991115009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991115081) 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, 193060 + ... + 239278.

It is an arithmetic number, because the mean of its divisors is an integer number (1260627390).

Almost surely, 2^9991115011 is an apocalyptic number.

9991115011 is a deficient number, since it is larger than the sum of its proper divisors (93904109).

9991115011 is a wasteful number, since it uses less digits than its factorization.

9991115011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48245.

The product of its (nonzero) digits is 3645, while the sum is 37.

The square root of 9991115011 is about 99955.5651827351. The cubic root of 9991115011 is about 2153.7964300127.

The spelling of 9991115011 in words is "nine billion, nine hundred ninety-one million, one hundred fifteen thousand, eleven".