211664335345 has 8 divisors (see below), whose sum is σ = 257057410176. Its totient is φ = 167291329776.

The previous prime is 211664335331. The next prime is 211664335349. The reversal of 211664335345 is 543533466112.

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 211664335345 - 2⁷ = 211664335217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211664335349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255016857 + ... + 255017686.

It is an arithmetic number, because the mean of its divisors is an integer number (32132176272).

Almost surely, 2^211664335345 is an apocalyptic number.

It is an amenable number.

211664335345 is a deficient number, since it is larger than the sum of its proper divisors (45393074831).

211664335345 is an equidigital number, since it uses as much as digits as its factorization.

211664335345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510034631.

The product of its digits is 777600, while the sum is 43.

The spelling of 211664335345 in words is "two hundred eleven billion, six hundred sixty-four million, three hundred thirty-five thousand, three hundred forty-five".