27422865641 has 2 divisors, whose sum is σ = 27422865642. Its totient is φ = 27422865640.

The previous prime is 27422865619. The next prime is 27422865643. The reversal of 27422865641 is 14656822472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27410113600 + 12752041 = 165560^2 + 3571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27422865641 is a prime.

It is a super-3 number, since 3×27422865641³ (a number of 32 digits) contains 333 as substring.

Together with 27422865643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27422865643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13711432820 + 13711432821.

It is an arithmetic number, because the mean of its divisors is an integer number (13711432821).

Almost surely, 2^27422865641 is an apocalyptic number.

It is an amenable number.

27422865641 is a deficient number, since it is larger than the sum of its proper divisors (1).

27422865641 is an equidigital number, since it uses as much as digits as its factorization.

27422865641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 47.

The spelling of 27422865641 in words is "twenty-seven billion, four hundred twenty-two million, eight hundred sixty-five thousand, six hundred forty-one".