550266163861 has 2 divisors, whose sum is σ = 550266163862. Its totient is φ = 550266163860.

The previous prime is 550266163847. The next prime is 550266163877. The reversal of 550266163861 is 168361662055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483602022225 + 66664141636 = 695415^2 + 258194^2 .

It is a cyclic number.

It is not a de Polignac number, because 550266163861 - 2¹³ = 550266155669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550266163831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275133081930 + 275133081931.

It is an arithmetic number, because the mean of its divisors is an integer number (275133081931).

Almost surely, 2^550266163861 is an apocalyptic number.

It is an amenable number.

550266163861 is a deficient number, since it is larger than the sum of its proper divisors (1).

550266163861 is an equidigital number, since it uses as much as digits as its factorization.

550266163861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 550266163861 in words is "five hundred fifty billion, two hundred sixty-six million, one hundred sixty-three thousand, eight hundred sixty-one".