999998886611 has 2 divisors, whose sum is σ = 999998886612. Its totient is φ = 999998886610.

The previous prime is 999998886581. The next prime is 999998886637. The reversal of 999998886611 is 116688899999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999998886611 - 2¹⁸ = 999998624467 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999998886611.

It is not a weakly prime, because it can be changed into another prime (999998886671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999443305 + 499999443306.

It is an arithmetic number, because the mean of its divisors is an integer number (499999443306).

Almost surely, 2^999998886611 is an apocalyptic number.

999998886611 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998886611 is an equidigital number, since it uses as much as digits as its factorization.

999998886611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088391168, while the sum is 83.

The spelling of 999998886611 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eighty-six thousand, six hundred eleven".