2163343830561 has 9 divisors (see below), whose sum is σ = 3124836351091. Its totient is φ = 1442226278712.

The previous prime is 2163343830523. The next prime is 2163343830581. The reversal of 2163343830561 is 1650383433612.

It is a happy number.

The square root of 2163343830561 is 1470831.

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

2163343830561 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 3 + 4 + 3 + 83 + 0 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 256061300625 + 1907282529936 = 506025^2 + 1381044^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2163343830561 - 2¹³ = 2163343822369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163343830521) by changing a digit.

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, 4167355 + ... + 4657631.

Almost surely, 2^{2163343830561} is an apocalyptic number.

2163343830561 is the 1470831-st square number.

2163343830561 is the 735416-th centered octagonal number.

It is an amenable number.

2163343830561 is a deficient number, since it is larger than the sum of its proper divisors (961492520530).

2163343830561 is an frugal number, since it uses more digits than its factorization.

2163343830561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980560 (or 490280 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 2163343830561 in words is "two trillion, one hundred sixty-three billion, three hundred forty-three million, eight hundred thirty thousand, five hundred sixty-one".