999445555566111 has 8 divisors (see below), whose sum is σ = 1332594989486640. Its totient is φ = 666296579344832.

The previous prime is 999445555566019. The next prime is 999445555566187. The reversal of 999445555566111 is 111665555544999.

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 999445555566111 - 2⁴⁶ = 929076811388447 is a prime.

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 (999445555566911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109296846 + ... + 118087643.

It is an arithmetic number, because the mean of its divisors is an integer number (166574373685830).

Almost surely, 2^{999445555566111} is an apocalyptic number.

999445555566111 is a deficient number, since it is larger than the sum of its proper divisors (333149433920529).

999445555566111 is a wasteful number, since it uses less digits than its factorization.

999445555566111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228849625.

The product of its digits is 1312200000, while the sum is 75.

The spelling of 999445555566111 in words is "nine hundred ninety-nine trillion, four hundred forty-five billion, five hundred fifty-five million, five hundred sixty-six thousand, one hundred eleven".