211361759817796 has 27 divisors (see below), whose sum is σ = 430272568256349. Its totient is φ = 90583524120768.

The previous prime is 211361759817763. The next prime is 211361759817821. The reversal of 211361759817796 is 697718957163112.

It is a happy number.

The square root of 211361759817796 is 14538286.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9421744304196 + 201940015513600 = 3069486^2 + 14210560^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 203016780 + ... + 204055228.

Almost surely, 2^{211361759817796} is an apocalyptic number.

211361759817796 is the 14538286-th square number.

It is an amenable number.

211361759817796 is an abundant number, since it is smaller than the sum of its proper divisors (218910808438553).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211361759817796 is an frugal number, since it uses more digits than its factorization.

211361759817796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076916 (or 1038458 counting only the distinct ones).

The product of its digits is 240045120, while the sum is 73.

The spelling of 211361759817796 in words is "two hundred eleven trillion, three hundred sixty-one billion, seven hundred fifty-nine million, eight hundred seventeen thousand, seven hundred ninety-six".