211045164805 has 8 divisors (see below), whose sum is σ = 253306845432. Its totient is φ = 168801033408.

The previous prime is 211045164797. The next prime is 211045164817. The reversal of 211045164805 is 508461540112.

It can be written as a sum of positive squares in 4 ways, for example, as 103128972769 + 107916192036 = 321137^2 + 328506^2 .

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 211045164805 - 2³ = 211045164797 is a prime.

It is a super-2 number, since 2×211045164805² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4360834 + ... + 4408963.

It is an arithmetic number, because the mean of its divisors is an integer number (31663355679).

Almost surely, 2^211045164805 is an apocalyptic number.

It is an amenable number.

211045164805 is a deficient number, since it is larger than the sum of its proper divisors (42261680627).

211045164805 is an equidigital number, since it uses as much as digits as its factorization.

211045164805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8774615.

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 211045164805 in words is "two hundred eleven billion, forty-five million, one hundred sixty-four thousand, eight hundred five".