28027561311811 has 2 divisors, whose sum is σ = 28027561311812. Its totient is φ = 28027561311810.

The previous prime is 28027561311803. The next prime is 28027561311823. The reversal of 28027561311811 is 11811316572082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28027561311811 - 2³ = 28027561311803 is a prime.

It is not a weakly prime, because it can be changed into another prime (28027561311851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14013780655905 + 14013780655906.

It is an arithmetic number, because the mean of its divisors is an integer number (14013780655906).

Almost surely, 2^{28027561311811} is an apocalyptic number.

28027561311811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28027561311811 is an equidigital number, since it uses as much as digits as its factorization.

28027561311811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 46.

Adding to 28027561311811 its reverse (11811316572082), we get a palindrome (39838877883893).

The spelling of 28027561311811 in words is "twenty-eight trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, eight hundred eleven".