211677229985 has 8 divisors (see below), whose sum is σ = 273552112680. Its totient is φ = 156315492864.

The previous prime is 211677229963. The next prime is 211677230047. The reversal of 211677229985 is 589922776112.

It can be written as a sum of positive squares in 4 ways, for example, as 1503578176 + 210173651809 = 38776^2 + 458447^2 .

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 211677229985 - 2¹² = 211677225889 is a prime.

It is a Curzon 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, 1628286320 + ... + 1628286449.

It is an arithmetic number, because the mean of its divisors is an integer number (34194014085).

Almost surely, 2^211677229985 is an apocalyptic number.

It is an amenable number.

211677229985 is a deficient number, since it is larger than the sum of its proper divisors (61874882695).

211677229985 is a wasteful number, since it uses less digits than its factorization.

211677229985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256572787.

The product of its digits is 7620480, while the sum is 59.

The spelling of 211677229985 in words is "two hundred eleven billion, six hundred seventy-seven million, two hundred twenty-nine thousand, nine hundred eighty-five".