508864561 has 2 divisors, whose sum is σ = 508864562. Its totient is φ = 508864560.

The previous prime is 508864549. The next prime is 508864583. The reversal of 508864561 is 165468805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413919025 + 94945536 = 20345^2 + 9744^2 .

It is a cyclic number.

It is not a de Polignac number, because 508864561 - 2¹⁵ = 508831793 is a prime.

It is not a weakly prime, because it can be changed into another prime (508864541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254432280 + 254432281.

It is an arithmetic number, because the mean of its divisors is an integer number (254432281).

Almost surely, 2^508864561 is an apocalyptic number.

It is an amenable number.

508864561 is a deficient number, since it is larger than the sum of its proper divisors (1).

508864561 is an equidigital number, since it uses as much as digits as its factorization.

508864561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 508864561 is about 22558.0265315918. The cubic root of 508864561 is about 798.3636139372.

The spelling of 508864561 in words is "five hundred eight million, eight hundred sixty-four thousand, five hundred sixty-one".