12540406811 has 2 divisors, whose sum is σ = 12540406812. Its totient is φ = 12540406810.

The previous prime is 12540406807. The next prime is 12540406819. The reversal of 12540406811 is 11860404521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12540406811 - 2² = 12540406807 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12540406819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270203405 + 6270203406.

It is an arithmetic number, because the mean of its divisors is an integer number (6270203406).

Almost surely, 2^12540406811 is an apocalyptic number.

12540406811 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540406811 is an equidigital number, since it uses as much as digits as its factorization.

12540406811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 12540406811 in words is "twelve billion, five hundred forty million, four hundred six thousand, eight hundred eleven".