27642230491 has 2 divisors, whose sum is σ = 27642230492. Its totient is φ = 27642230490.

The previous prime is 27642230489. The next prime is 27642230501. The reversal of 27642230491 is 19403224672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27642230491 - 2¹ = 27642230489 is a prime.

Together with 27642230489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27642230191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13821115245 + 13821115246.

It is an arithmetic number, because the mean of its divisors is an integer number (13821115246).

Almost surely, 2^27642230491 is an apocalyptic number.

27642230491 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642230491 is an equidigital number, since it uses as much as digits as its factorization.

27642230491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 27642230491 in words is "twenty-seven billion, six hundred forty-two million, two hundred thirty thousand, four hundred ninety-one".