16205786497 has 2 divisors, whose sum is σ = 16205786498. Its totient is φ = 16205786496.

The previous prime is 16205786477. The next prime is 16205786501. The reversal of 16205786497 is 79468750261.

16205786497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16098788161 + 106998336 = 126881^2 + 10344^2 .

It is an emirp because it is prime and its reverse (79468750261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16205786497 - 2²⁷ = 16071568769 is a prime.

It is not a weakly prime, because it can be changed into another prime (16205786447) 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, 8102893248 + 8102893249.

It is an arithmetic number, because the mean of its divisors is an integer number (8102893249).

Almost surely, 2^16205786497 is an apocalyptic number.

It is an amenable number.

16205786497 is a deficient number, since it is larger than the sum of its proper divisors (1).

16205786497 is an equidigital number, since it uses as much as digits as its factorization.

16205786497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 16205786497 in words is "sixteen billion, two hundred five million, seven hundred eighty-six thousand, four hundred ninety-seven".