12856497811 has 2 divisors, whose sum is σ = 12856497812. Its totient is φ = 12856497810.

The previous prime is 12856497769. The next prime is 12856497851. The reversal of 12856497811 is 11879465821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12856497811 - 2¹³ = 12856489619 is a prime.

It is not a weakly prime, because it can be changed into another prime (12856497851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428248905 + 6428248906.

It is an arithmetic number, because the mean of its divisors is an integer number (6428248906).

Almost surely, 2^12856497811 is an apocalyptic number.

12856497811 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856497811 is an equidigital number, since it uses as much as digits as its factorization.

12856497811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 52.

The spelling of 12856497811 in words is "twelve billion, eight hundred fifty-six million, four hundred ninety-seven thousand, eight hundred eleven".