56775559 has 2 divisors, whose sum is σ = 56775560. Its totient is φ = 56775558.

The previous prime is 56775541. The next prime is 56775581. The reversal of 56775559 is 95557765.

56775559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56775559 - 2¹¹ = 56773511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56775959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28387779 + 28387780.

It is an arithmetic number, because the mean of its divisors is an integer number (28387780).

Almost surely, 2^56775559 is an apocalyptic number.

56775559 is a deficient number, since it is larger than the sum of its proper divisors (1).

56775559 is an equidigital number, since it uses as much as digits as its factorization.

56775559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653750, while the sum is 49.

The square root of 56775559 is about 7534.9558061080. The cubic root of 56775559 is about 384.3443250379.

It can be divided in two parts, 5677 and 5559, that added together give a square (11236 = 106²).

The spelling of 56775559 in words is "fifty-six million, seven hundred seventy-five thousand, five hundred fifty-nine".