56172105559 has 2 divisors, whose sum is σ = 56172105560. Its totient is φ = 56172105558.

The previous prime is 56172105541. The next prime is 56172105641. The reversal of 56172105559 is 95550127165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56172105559 - 2⁹ = 56172105047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56172105859) 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, 28086052779 + 28086052780.

It is an arithmetic number, because the mean of its divisors is an integer number (28086052780).

Almost surely, 2^56172105559 is an apocalyptic number.

56172105559 is a deficient number, since it is larger than the sum of its proper divisors (1).

56172105559 is an equidigital number, since it uses as much as digits as its factorization.

56172105559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472500, while the sum is 46.

The spelling of 56172105559 in words is "fifty-six billion, one hundred seventy-two million, one hundred five thousand, five hundred fifty-nine".