999999999611 has 2 divisors, whose sum is σ = 999999999612. Its totient is φ = 999999999610.

The previous prime is 999999999599. The next prime is 999999999617. The reversal of 999999999611 is 116999999999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999999999611 - 2³⁰ = 998926257787 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (999999999617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999999805 + 499999999806.

It is an arithmetic number, because the mean of its divisors is an integer number (499999999806).

Almost surely, 2^999999999611 is an apocalyptic number.

999999999611 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999999611 is an equidigital number, since it uses as much as digits as its factorization.

999999999611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2324522934, while the sum is 89.

The spelling of 999999999611 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred eleven".