56006205557 has 2 divisors, whose sum is σ = 56006205558. Its totient is φ = 56006205556.

The previous prime is 56006205523. The next prime is 56006205599. The reversal of 56006205557 is 75550260065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52127282596 + 3878922961 = 228314^2 + 62281^2 .

It is a cyclic number.

It is not a de Polignac number, because 56006205557 - 2⁸ = 56006205301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56006205517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28003102778 + 28003102779.

It is an arithmetic number, because the mean of its divisors is an integer number (28003102779).

Almost surely, 2^56006205557 is an apocalyptic number.

It is an amenable number.

56006205557 is a deficient number, since it is larger than the sum of its proper divisors (1).

56006205557 is an equidigital number, since it uses as much as digits as its factorization.

56006205557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315000, while the sum is 41.

The spelling of 56006205557 in words is "fifty-six billion, six million, two hundred five thousand, five hundred fifty-seven".