55444013664217 has 2 divisors, whose sum is σ = 55444013664218. Its totient is φ = 55444013664216.

The previous prime is 55444013664199. The next prime is 55444013664307. The reversal of 55444013664217 is 71246631044455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49035440405961 + 6408573258256 = 7002531^2 + 2531516^2 .

It is a cyclic number.

It is not a de Polignac number, because 55444013664217 - 2¹⁵ = 55444013631449 is a prime.

It is not a weakly prime, because it can be changed into another prime (55444013662217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722006832108 + 27722006832109.

It is an arithmetic number, because the mean of its divisors is an integer number (27722006832109).

Almost surely, 2^{55444013664217} is an apocalyptic number.

It is an amenable number.

55444013664217 is a deficient number, since it is larger than the sum of its proper divisors (1).

55444013664217 is an equidigital number, since it uses as much as digits as its factorization.

55444013664217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9676800, while the sum is 52.

The spelling of 55444013664217 in words is "fifty-five trillion, four hundred forty-four billion, thirteen million, six hundred sixty-four thousand, two hundred seventeen".