56606657617 has 2 divisors, whose sum is σ = 56606657618. Its totient is φ = 56606657616.

The previous prime is 56606657593. The next prime is 56606657641. The reversal of 56606657617 is 71675660665.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (56606657593) and next prime (56606657641).

It can be written as a sum of positive squares in only one way, i.e., 39868508241 + 16738149376 = 199671^2 + 129376^2 .

It is a cyclic number.

It is not a de Polignac number, because 56606657617 - 2³¹ = 54459173969 is a prime.

It is not a weakly prime, because it can be changed into another prime (56606654617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28303328808 + 28303328809.

It is an arithmetic number, because the mean of its divisors is an integer number (28303328809).

Almost surely, 2^56606657617 is an apocalyptic number.

It is an amenable number.

56606657617 is a deficient number, since it is larger than the sum of its proper divisors (1).

56606657617 is an equidigital number, since it uses as much as digits as its factorization.

56606657617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 56606657617 in words is "fifty-six billion, six hundred six million, six hundred fifty-seven thousand, six hundred seventeen".