550215261569 has 2 divisors, whose sum is σ = 550215261570. Its totient is φ = 550215261568.

The previous prime is 550215261553. The next prime is 550215261619. The reversal of 550215261569 is 965162512055.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547989309169 + 2225952400 = 740263^2 + 47180^2 .

It is a cyclic number.

It is not a de Polignac number, because 550215261569 - 2⁴ = 550215261553 is a prime.

It is a super-2 number, since 2×550215261569² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (550215261539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275107630784 + 275107630785.

It is an arithmetic number, because the mean of its divisors is an integer number (275107630785).

Almost surely, 2^550215261569 is an apocalyptic number.

It is an amenable number.

550215261569 is a deficient number, since it is larger than the sum of its proper divisors (1).

550215261569 is an equidigital number, since it uses as much as digits as its factorization.

550215261569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 550215261569 in words is "five hundred fifty billion, two hundred fifteen million, two hundred sixty-one thousand, five hundred sixty-nine".