272649765221 has 4 divisors (see below), whose sum is σ = 273241196844. Its totient is φ = 272058333600.

The previous prime is 272649765133. The next prime is 272649765239. The reversal of 272649765221 is 122567946272.

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 64084922500 + 208564842721 = 253150^2 + 456689^2 .

It is a cyclic number.

It is not a de Polignac number, because 272649765221 - 2¹⁴ = 272649748837 is a prime.

It is a super-4 number, since 4×272649765221⁴ (a number of 47 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272649765251) 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, 295715120 + ... + 295716041.

It is an arithmetic number, because the mean of its divisors is an integer number (68310299211).

Almost surely, 2^272649765221 is an apocalyptic number.

It is an amenable number.

272649765221 is a deficient number, since it is larger than the sum of its proper divisors (591431623).

272649765221 is an equidigital number, since it uses as much as digits as its factorization.

272649765221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591431622.

The product of its digits is 5080320, while the sum is 53.

The spelling of 272649765221 in words is "two hundred seventy-two billion, six hundred forty-nine million, seven hundred sixty-five thousand, two hundred twenty-one".