493964571509 has 2 divisors, whose sum is σ = 493964571510. Its totient is φ = 493964571508.

The previous prime is 493964571473. The next prime is 493964571629. The reversal of 493964571509 is 905175469394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255249269284 + 238715302225 = 505222^2 + 488585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-493964571509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493964571209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246982285754 + 246982285755.

It is an arithmetic number, because the mean of its divisors is an integer number (246982285755).

Almost surely, 2^493964571509 is an apocalyptic number.

It is an amenable number.

493964571509 is a deficient number, since it is larger than the sum of its proper divisors (1).

493964571509 is an equidigital number, since it uses as much as digits as its factorization.

493964571509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36741600, while the sum is 62.

The spelling of 493964571509 in words is "four hundred ninety-three billion, nine hundred sixty-four million, five hundred seventy-one thousand, five hundred nine".