211845065705 has 64 divisors (see below), whose sum is σ = 322279845888. Its totient is φ = 130103366400.

The previous prime is 211845065699. The next prime is 211845065749. The reversal of 211845065705 is 507560548112.

It is not a de Polignac number, because 211845065705 - 2²⁸ = 211576630249 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2918462 + ... + 2990168.

It is an arithmetic number, because the mean of its divisors is an integer number (5035622592).

Almost surely, 2^211845065705 is an apocalyptic number.

It is an amenable number.

211845065705 is a deficient number, since it is larger than the sum of its proper divisors (110434780183).

211845065705 is a wasteful number, since it uses less digits than its factorization.

211845065705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71926.

The product of its (nonzero) digits is 336000, while the sum is 44.

The spelling of 211845065705 in words is "two hundred eleven billion, eight hundred forty-five million, sixty-five thousand, seven hundred five".