16963256509 has 2 divisors, whose sum is σ = 16963256510. Its totient is φ = 16963256508.

The previous prime is 16963256459. The next prime is 16963256537. The reversal of 16963256509 is 90565236961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14635676484 + 2327580025 = 120978^2 + 48245^2 .

It is a cyclic number.

It is not a de Polignac number, because 16963256509 - 2⁷ = 16963256381 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16963256579) 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, 8481628254 + 8481628255.

It is an arithmetic number, because the mean of its divisors is an integer number (8481628255).

Almost surely, 2^16963256509 is an apocalyptic number.

It is an amenable number.

16963256509 is a deficient number, since it is larger than the sum of its proper divisors (1).

16963256509 is an equidigital number, since it uses as much as digits as its factorization.

16963256509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 16963256509 in words is "sixteen billion, nine hundred sixty-three million, two hundred fifty-six thousand, five hundred nine".