56536218652811 has 2 divisors, whose sum is σ = 56536218652812. Its totient is φ = 56536218652810.

The previous prime is 56536218652751. The next prime is 56536218652813. The reversal of 56536218652811 is 11825681263565.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56536218652811 - 2¹⁴ = 56536218636427 is a prime.

It is a Sophie Germain prime.

Together with 56536218652813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56536218652813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28268109326405 + 28268109326406.

It is an arithmetic number, because the mean of its divisors is an integer number (28268109326406).

Almost surely, 2^{56536218652811} is an apocalyptic number.

56536218652811 is a deficient number, since it is larger than the sum of its proper divisors (1).

56536218652811 is an equidigital number, since it uses as much as digits as its factorization.

56536218652811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736000, while the sum is 59.

The spelling of 56536218652811 in words is "fifty-six trillion, five hundred thirty-six billion, two hundred eighteen million, six hundred fifty-two thousand, eight hundred eleven".