999999654111111 has 4 divisors (see below), whose sum is σ = 1333332872148152. Its totient is φ = 666666436074072.

The previous prime is 999999654111083. The next prime is 999999654111179. The reversal of 999999654111111 is 111111456999999.

999999654111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 999999654111111 - 2²² = 999999649916807 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999654111611) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166666609018516 + ... + 166666609018521.

It is an arithmetic number, because the mean of its divisors is an integer number (333333218037038).

Almost surely, 2^{999999654111111} is an apocalyptic number.

999999654111111 is a deficient number, since it is larger than the sum of its proper divisors (333333218037041).

999999654111111 is a wasteful number, since it uses less digits than its factorization.

999999654111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333333218037040.

The product of its digits is 63772920, while the sum is 75.

The spelling of 999999654111111 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, six hundred fifty-four million, one hundred eleven thousand, one hundred eleven".