2163430643653 has 4 divisors (see below), whose sum is σ = 2164374139468. Its totient is φ = 2162487147840.

The previous prime is 2163430643611. The next prime is 2163430643663. The reversal of 2163430643653 is 3563460343612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1091174535649 + 1072256108004 = 1044593^2 + 1035498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2163430643653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163430643663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471744468 + ... + 471749053.

It is an arithmetic number, because the mean of its divisors is an integer number (541093534867).

Almost surely, 2^{2163430643653} is an apocalyptic number.

It is an amenable number.

2163430643653 is a deficient number, since it is larger than the sum of its proper divisors (943495815).

2163430643653 is an equidigital number, since it uses as much as digits as its factorization.

2163430643653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943495814.

The product of its (nonzero) digits is 2799360, while the sum is 46.

The spelling of 2163430643653 in words is "two trillion, one hundred sixty-three billion, four hundred thirty million, six hundred forty-three thousand, six hundred fifty-three".