16808243633 has 2 divisors, whose sum is σ = 16808243634. Its totient is φ = 16808243632.

The previous prime is 16808243629. The next prime is 16808243651. The reversal of 16808243633 is 33634280861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16794345649 + 13897984 = 129593^2 + 3728^2 .

It is an emirp because it is prime and its reverse (33634280861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16808243633 - 2² = 16808243629 is a prime.

It is not a weakly prime, because it can be changed into another prime (16808243653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8404121816 + 8404121817.

It is an arithmetic number, because the mean of its divisors is an integer number (8404121817).

Almost surely, 2^16808243633 is an apocalyptic number.

It is an amenable number.

16808243633 is a deficient number, since it is larger than the sum of its proper divisors (1).

16808243633 is an equidigital number, since it uses as much as digits as its factorization.

16808243633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 16808243633 in words is "sixteen billion, eight hundred eight million, two hundred forty-three thousand, six hundred thirty-three".