16568230993 has 2 divisors, whose sum is σ = 16568230994. Its totient is φ = 16568230992.

The previous prime is 16568230979. The next prime is 16568231027. The reversal of 16568230993 is 39903286561.

16568230993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10220603409 + 6347627584 = 101097^2 + 79672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16568230993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16568230993.

It is not a weakly prime, because it can be changed into another prime (16568260993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8284115496 + 8284115497.

It is an arithmetic number, because the mean of its divisors is an integer number (8284115497).

Almost surely, 2^16568230993 is an apocalyptic number.

It is an amenable number.

16568230993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16568230993 is an equidigital number, since it uses as much as digits as its factorization.

16568230993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 16568230993 in words is "sixteen billion, five hundred sixty-eight million, two hundred thirty thousand, nine hundred ninety-three".