56505343777 has 2 divisors, whose sum is σ = 56505343778. Its totient is φ = 56505343776.

The previous prime is 56505343753. The next prime is 56505343781. The reversal of 56505343777 is 77734350565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48266332416 + 8239011361 = 219696^2 + 90769^2 .

It is a cyclic number.

It is not a de Polignac number, because 56505343777 - 2²³ = 56496955169 is a prime.

It is not a weakly prime, because it can be changed into another prime (56505343747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28252671888 + 28252671889.

It is an arithmetic number, because the mean of its divisors is an integer number (28252671889).

Almost surely, 2^56505343777 is an apocalyptic number.

It is an amenable number.

56505343777 is a deficient number, since it is larger than the sum of its proper divisors (1).

56505343777 is an equidigital number, since it uses as much as digits as its factorization.

56505343777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9261000, while the sum is 52.

The spelling of 56505343777 in words is "fifty-six billion, five hundred five million, three hundred forty-three thousand, seven hundred seventy-seven".