273243654721 has 4 divisors (see below), whose sum is σ = 273780479700. Its totient is φ = 272706829744.

The previous prime is 273243654689. The next prime is 273243654727. The reversal of 273243654721 is 127456342372.

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 159380600625 + 113863054096 = 399225^2 + 337436^2 .

It is a cyclic number.

It is not a de Polignac number, because 273243654721 - 2⁵ = 273243654689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (273243654727) 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, 268411726 + ... + 268412743.

It is an arithmetic number, because the mean of its divisors is an integer number (68445119925).

Almost surely, 2^273243654721 is an apocalyptic number.

It is an amenable number.

273243654721 is a deficient number, since it is larger than the sum of its proper divisors (536824979).

273243654721 is an equidigital number, since it uses as much as digits as its factorization.

273243654721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536824978.

The product of its digits is 1693440, while the sum is 46.

The spelling of 273243654721 in words is "two hundred seventy-three billion, two hundred forty-three million, six hundred fifty-four thousand, seven hundred twenty-one".