56874618217 has 2 divisors, whose sum is σ = 56874618218. Its totient is φ = 56874618216.

The previous prime is 56874618211. The next prime is 56874618289. The reversal of 56874618217 is 71281647865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31410118441 + 25464499776 = 177229^2 + 159576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56874618217 is a prime.

It is not a weakly prime, because it can be changed into another prime (56874618211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28437309108 + 28437309109.

It is an arithmetic number, because the mean of its divisors is an integer number (28437309109).

Almost surely, 2^56874618217 is an apocalyptic number.

It is an amenable number.

56874618217 is a deficient number, since it is larger than the sum of its proper divisors (1).

56874618217 is an equidigital number, since it uses as much as digits as its factorization.

56874618217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 55.

The spelling of 56874618217 in words is "fifty-six billion, eight hundred seventy-four million, six hundred eighteen thousand, two hundred seventeen".