56773138777 has 2 divisors, whose sum is σ = 56773138778. Its totient is φ = 56773138776.

The previous prime is 56773138771. The next prime is 56773138819. The reversal of 56773138777 is 77783137765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54318828096 + 2454310681 = 233064^2 + 49541^2 .

It is a cyclic number.

It is not a de Polignac number, because 56773138777 - 2⁷ = 56773138649 is a prime.

It is not a weakly prime, because it can be changed into another prime (56773138771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28386569388 + 28386569389.

It is an arithmetic number, because the mean of its divisors is an integer number (28386569389).

Almost surely, 2^56773138777 is an apocalyptic number.

It is an amenable number.

56773138777 is a deficient number, since it is larger than the sum of its proper divisors (1).

56773138777 is an equidigital number, since it uses as much as digits as its factorization.

56773138777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36303120, while the sum is 61.

The spelling of 56773138777 in words is "fifty-six billion, seven hundred seventy-three million, one hundred thirty-eight thousand, seven hundred seventy-seven".