13205934478811 has 2 divisors, whose sum is σ = 13205934478812. Its totient is φ = 13205934478810.

The previous prime is 13205934478703. The next prime is 13205934478883. The reversal of 13205934478811 is 11887443950231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13205934478811 is a prime.

It is not a weakly prime, because it can be changed into another prime (13205934408811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6602967239405 + 6602967239406.

It is an arithmetic number, because the mean of its divisors is an integer number (6602967239406).

Almost surely, 2^{13205934478811} is an apocalyptic number.

13205934478811 is a deficient number, since it is larger than the sum of its proper divisors (1).

13205934478811 is an equidigital number, since it uses as much as digits as its factorization.

13205934478811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 13205934478811 in words is "thirteen trillion, two hundred five billion, nine hundred thirty-four million, four hundred seventy-eight thousand, eight hundred eleven".