56243777773 has 2 divisors, whose sum is σ = 56243777774. Its totient is φ = 56243777772.

The previous prime is 56243777767. The next prime is 56243777809. The reversal of 56243777773 is 37777734265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50361194569 + 5882583204 = 224413^2 + 76698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56243777773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56243777753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28121888886 + 28121888887.

It is an arithmetic number, because the mean of its divisors is an integer number (28121888887).

Almost surely, 2^56243777773 is an apocalyptic number.

It is an amenable number.

56243777773 is a deficient number, since it is larger than the sum of its proper divisors (1).

56243777773 is an equidigital number, since it uses as much as digits as its factorization.

56243777773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36303120, while the sum is 58.

The spelling of 56243777773 in words is "fifty-six billion, two hundred forty-three million, seven hundred seventy-seven thousand, seven hundred seventy-three".