55827525780217 has 2 divisors, whose sum is σ = 55827525780218. Its totient is φ = 55827525780216.

The previous prime is 55827525780023. The next prime is 55827525780251. The reversal of 55827525780217 is 71208752572855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54945393450256 + 882132329961 = 7412516^2 + 939219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55827525780217 is a prime.

It is not a weakly prime, because it can be changed into another prime (55827525780287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27913762890108 + 27913762890109.

It is an arithmetic number, because the mean of its divisors is an integer number (27913762890109).

Almost surely, 2^{55827525780217} is an apocalyptic number.

It is an amenable number.

55827525780217 is a deficient number, since it is larger than the sum of its proper divisors (1).

55827525780217 is an equidigital number, since it uses as much as digits as its factorization.

55827525780217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109760000, while the sum is 64.

The spelling of 55827525780217 in words is "fifty-five trillion, eight hundred twenty-seven billion, five hundred twenty-five million, seven hundred eighty thousand, two hundred seventeen".