16705287449 has 2 divisors, whose sum is σ = 16705287450. Its totient is φ = 16705287448.

The previous prime is 16705287413. The next prime is 16705287463. The reversal of 16705287449 is 94478250761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14320430224 + 2384857225 = 119668^2 + 48835^2 .

It is an emirp because it is prime and its reverse (94478250761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16705287449 - 2²⁸ = 16436851993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16705287449.

It is not a weakly prime, because it can be changed into another prime (16705287479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8352643724 + 8352643725.

It is an arithmetic number, because the mean of its divisors is an integer number (8352643725).

Almost surely, 2^16705287449 is an apocalyptic number.

It is an amenable number.

16705287449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16705287449 is an equidigital number, since it uses as much as digits as its factorization.

16705287449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 16705287449 in words is "sixteen billion, seven hundred five million, two hundred eighty-seven thousand, four hundred forty-nine".