9999995911 has 2 divisors, whose sum is σ = 9999995912. Its totient is φ = 9999995910.

The previous prime is 9999995881. The next prime is 9999995953. The reversal of 9999995911 is 1195999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999995911 - 2⁵ = 9999995879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999995311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999997955 + 4999997956.

It is an arithmetic number, because the mean of its divisors is an integer number (4999997956).

Almost surely, 2^9999995911 is an apocalyptic number.

9999995911 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999995911 is an equidigital number, since it uses as much as digits as its factorization.

9999995911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23914845, while the sum is 70.

The square root of 9999995911 is about 99999.9795549979. The cubic root of 9999995911 is about 2154.4343963824.

The spelling of 9999995911 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-five thousand, nine hundred eleven".