211100055665 has 8 divisors (see below), whose sum is σ = 261491682048. Its totient is φ = 163432301040.

The previous prime is 211100055643. The next prime is 211100055671. The reversal of 211100055665 is 566550001112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211100055665 - 2⁸ = 211100055409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680967767 + ... + 680968076.

It is an arithmetic number, because the mean of its divisors is an integer number (32686460256).

Almost surely, 2^211100055665 is an apocalyptic number.

It is an amenable number.

211100055665 is a deficient number, since it is larger than the sum of its proper divisors (50391626383).

211100055665 is a wasteful number, since it uses less digits than its factorization.

211100055665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361935879.

The product of its (nonzero) digits is 9000, while the sum is 32.

Adding to 211100055665 its reverse (566550001112), we get a palindrome (777650056777).

The spelling of 211100055665 in words is "two hundred eleven billion, one hundred million, fifty-five thousand, six hundred sixty-five".