56818247813 has 2 divisors, whose sum is σ = 56818247814. Its totient is φ = 56818247812.

The previous prime is 56818247797. The next prime is 56818247819. The reversal of 56818247813 is 31874281865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56362083649 + 456164164 = 237407^2 + 21358^2 .

It is a cyclic number.

It is not a de Polignac number, because 56818247813 - 2⁴ = 56818247797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56818247819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28409123906 + 28409123907.

It is an arithmetic number, because the mean of its divisors is an integer number (28409123907).

Almost surely, 2^56818247813 is an apocalyptic number.

It is an amenable number.

56818247813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56818247813 is an equidigital number, since it uses as much as digits as its factorization.

56818247813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2580480, while the sum is 53.

The spelling of 56818247813 in words is "fifty-six billion, eight hundred eighteen million, two hundred forty-seven thousand, eight hundred thirteen".