505536766849 has 2 divisors, whose sum is σ = 505536766850. Its totient is φ = 505536766848.

The previous prime is 505536766817. The next prime is 505536766907. The reversal of 505536766849 is 948667635505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259699294449 + 245837472400 = 509607^2 + 495820^2 .

It is a cyclic number.

It is not a de Polignac number, because 505536766849 - 2⁵ = 505536766817 is a prime.

It is a super-2 number, since 2×505536766849² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505536766649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252768383424 + 252768383425.

It is an arithmetic number, because the mean of its divisors is an integer number (252768383425).

Almost surely, 2^505536766849 is an apocalyptic number.

It is an amenable number.

505536766849 is a deficient number, since it is larger than the sum of its proper divisors (1).

505536766849 is an equidigital number, since it uses as much as digits as its factorization.

505536766849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296000, while the sum is 64.

The spelling of 505536766849 in words is "five hundred five billion, five hundred thirty-six million, seven hundred sixty-six thousand, eight hundred forty-nine".