999995555511111 has 32 divisors (see below), whose sum is σ = 1370914336705536. Its totient is φ = 647990969472000.

The previous prime is 999995555511107. The next prime is 999995555511163. The reversal of 999995555511111 is 111115555599999.

It is not a de Polignac number, because 999995555511111 - 2² = 999995555511107 is a prime.

It is a super-2 number, since 2×999995555511111² (a number of 31 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999995555511191) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1893950431 + ... + 1894478351.

It is an arithmetic number, because the mean of its divisors is an integer number (42841073022048).

Almost surely, 2^{999995555511111} is an apocalyptic number.

999995555511111 is a deficient number, since it is larger than the sum of its proper divisors (370918781194425).

999995555511111 is a wasteful number, since it uses less digits than its factorization.

999995555511111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585063.

The product of its digits is 184528125, while the sum is 75.

The spelling of 999995555511111 in words is "nine hundred ninety-nine trillion, nine hundred ninety-five billion, five hundred fifty-five million, five hundred eleven thousand, one hundred eleven".