16800821759 has 2 divisors, whose sum is σ = 16800821760. Its totient is φ = 16800821758.

The previous prime is 16800821701. The next prime is 16800821789. The reversal of 16800821759 is 95712800861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16800821759 - 2⁸ = 16800821503 is a prime.

It is a super-2 number, since 2×16800821759² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16800821789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8400410879 + 8400410880.

It is an arithmetic number, because the mean of its divisors is an integer number (8400410880).

Almost surely, 2^16800821759 is an apocalyptic number.

16800821759 is a deficient number, since it is larger than the sum of its proper divisors (1).

16800821759 is an equidigital number, since it uses as much as digits as its factorization.

16800821759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 16800821759 in words is "sixteen billion, eight hundred million, eight hundred twenty-one thousand, seven hundred fifty-nine".