16546447765249 has 2 divisors, whose sum is σ = 16546447765250. Its totient is φ = 16546447765248.

The previous prime is 16546447765171. The next prime is 16546447765271. The reversal of 16546447765249 is 94256774464561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14491969876224 + 2054477889025 = 3806832^2 + 1433345^2 .

It is an emirp because it is prime and its reverse (94256774464561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16546447765249 - 2¹³ = 16546447757057 is a prime.

It is a super-2 number, since 2×16546447765249² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16546447765049) 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, 8273223882624 + 8273223882625.

It is an arithmetic number, because the mean of its divisors is an integer number (8273223882625).

Almost surely, 2^{16546447765249} is an apocalyptic number.

It is an amenable number.

16546447765249 is a deficient number, since it is larger than the sum of its proper divisors (1).

16546447765249 is an equidigital number, since it uses as much as digits as its factorization.

16546447765249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1219276800, while the sum is 70.

The spelling of 16546447765249 in words is "sixteen trillion, five hundred forty-six billion, four hundred forty-seven million, seven hundred sixty-five thousand, two hundred forty-nine".