28027561311643 has 2 divisors, whose sum is σ = 28027561311644. Its totient is φ = 28027561311642.

The previous prime is 28027561311613. The next prime is 28027561311677. The reversal of 28027561311643 is 34611316572082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28027561311643 - 2¹³ = 28027561303451 is a prime.

It is not a weakly prime, because it can be changed into another prime (28027561311613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14013780655821 + 14013780655822.

It is an arithmetic number, because the mean of its divisors is an integer number (14013780655822).

Almost surely, 2^{28027561311643} is an apocalyptic number.

28027561311643 is a deficient number, since it is larger than the sum of its proper divisors (1).

28027561311643 is an equidigital number, since it uses as much as digits as its factorization.

28027561311643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 28027561311643 in words is "twenty-eight trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, six hundred forty-three".