56420626777 has 2 divisors, whose sum is σ = 56420626778. Its totient is φ = 56420626776.

The previous prime is 56420626753. The next prime is 56420626793. The reversal of 56420626777 is 77762602465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41058511641 + 15362115136 = 202629^2 + 123944^2 .

It is a cyclic number.

It is not a de Polignac number, because 56420626777 - 2⁷ = 56420626649 is a prime.

It is not a weakly prime, because it can be changed into another prime (56420626747) 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, 28210313388 + 28210313389.

It is an arithmetic number, because the mean of its divisors is an integer number (28210313389).

Almost surely, 2^56420626777 is an apocalyptic number.

It is an amenable number.

56420626777 is a deficient number, since it is larger than the sum of its proper divisors (1).

56420626777 is an equidigital number, since it uses as much as digits as its factorization.

56420626777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 52.

The spelling of 56420626777 in words is "fifty-six billion, four hundred twenty million, six hundred twenty-six thousand, seven hundred seventy-seven".